95 Which percent of the total project labor hours are typically expended by the end of the second phase of the project life cycle?A. 5%B. 10%C. 15%D. 25%E. 50%

资料：It’s almost considered sacrilegious today to leave work at the end of your workday or（for shame！）on a Friday and simply not check your work email again until you return the office during normal working hours。
The constant need to check email is the trade-off the modern workforce has made for the ability to work anytime，anywhere，hanks to smartphones and tablets that keep us always connected。
But three university researchers have found that it’s not just doing a bit of work after hours that cause burnout。The true culprit is actually the constant worrying about off-hour email。
A new study。“Exhausted But Unable to Disconnect，”by Lehigh University’s Liuba Belkin，Virginia Tech’s William Becker and Colorado State University's Samantha Conroy shows that employees are growing exhausted by the expectation that they will always be available，never knowing what kind of work requests will be asked of them off hours。
Typically，companies don’t mean to stress employees out like that。Most companies don't have formal policies that say people must answer work emails after-hours，（except，perhaps，in cases where an employee is on call during specific times）。
But policies and culture tend to be two different things。If supervisors routinely email employees after hours and expect a fast response （often because their supervisors are doing the same to them），then the message is clear: whenever the boss emails，the employee is expected to be available。
The solution is for bosses to tell employees that an after-hours email doesn’t necessarily require a response before the next work day，and to also set some times when after-hours emailing is considered acceptable and prohibited，such as no emails via the dinner hour，on weekends，or after 10 p.m.，the researchers say。

Why the study said people are “Exhausted But Unable to Disconnect”？

A.Because they never know what kind of work requests will be asked off hours.
B.Because they are required by the company to answer emails off hours.
C.Because smart phones and tablets keep us connected all the time.
D.None of above.

共用题干
第二篇

Home Heating

Central heating became popular only after the Civil War.Typically,coal-burning
furnaces（火炉）fueled the early systems.Natural gas had developed into the leading fuel
by 1960.Its acceptance resulted in part from its wide uses.Because it comes primarily
from U.S.and Canadian fields , natural gas is also less vulnerable（脆弱的）than oil is to
war.Oil remains the most important fuel in a few areas,such as New England.
Electric heating dominates most areas with mild winters and cheap electricity,including
the South and the Northwest.It was made popular at least in the South by the low cost of
adding electric heating to new houses built with air-conditioning.Bottled gas,which is
somewhat more expensive than utility gas,is the fuel of choice in rural areas not served by
utility pipelines.Wood is the leading heating fuel in just a few rural counties.
Home heating,which accounts for less than 7 per cent of all energy consumed in the
U.S.,has had a commendable（值得赞扬的）efficiency record : from 1 978 to 1 997 , the
amount of fuel consumed for this purpose declined 44 per cent despite a 33 per cent
increase in the number of housing units and an increase in house size.The
U.S.Department of Energy,however,forecasts that energy used in home heating will rise
by 14 per cent over the next two decades.That rise is small considering an expected 21 per
cent increase in the number of houses and the trend toward larger houses.
Natural gas and electricity will probably dominate the home heating market for the next
two decades.Solar（太阳的）heating never became popular because of cost and limited
winter sunlight in most areas;in 2000 only 47,000 homes relied on it.

According to paragraph 3,energy consumed in home heating over the next two decades will increase by
A:33 per cent.
B:31 per cent.
C:21 per cent.
D:14 per cent.

资料：It’s almost considered sacrilegious today to leave work at the end of your workday or（for shame！）on a Friday and simply not check your work email again until you return the office during normal working hours。
The constant need to check email is the trade-off the modern workforce has made for the ability to work anytime，anywhere，hanks to smartphones and tablets that keep us always connected。
But three university researchers have found that it’s not just doing a bit of work after hours that cause burnout。The true culprit is actually the constant worrying about off-hour email。
A new study。“Exhausted But Unable to Disconnect，”by Lehigh University’s Liuba Belkin，Virginia Tech’s William Becker and Colorado State University's Samantha Conroy shows that employees are growing exhausted by the expectation that they will always be available，never knowing what kind of work requests will be asked of them off hours。
Typically，companies don’t mean to stress employees out like that。Most companies don't have formal policies that say people must answer work emails after-hours，（except，perhaps，in cases where an employee is on call during specific times）。
But policies and culture tend to be two different things。If supervisors routinely email employees after hours and expect a fast response （often because their supervisors are doing the same to them），then the message is clear: whenever the boss emails，the employee is expected to be available。
The solution is for bosses to tell employees that an after-hours email doesn’t necessarily require a response before the next work day，and to also set some times when after-hours emailing is considered acceptable and prohibited，such as no emails via the dinner hour，on weekends，or after 10 p.m.，the researchers say。

What is this passage mainly about？

A.Bosses push employees to work by sending emails anytime.
B.Employees are exhausted by the constant need to check emails.
C.Companies mean to stress the workers out by sending emails.
D.None of above