A、do
B、is
C、does
第1题:
_______ of the students has two books.
A、All
B、Both
C、Each
D、Every
第2题:
A. Every 5 minutes
B. Every 90 seconds
C. Every 60 seconds
D. Every 30 seconds
第3题:
Cargo booms must be weight tested to recertify the Safe Working Load(SWL)every ______.
A.Year
B.Two years
C.Four years
D.Five years
第4题:
A.onceaday
B.onceaweek
C.everyminute
D.every30minutes
第5题:
Each life jacket light that has a non-replaceable power source must be replaced ______.
A.every 6 months after initial installation
B.every 12 months after initial installation
C.every 24 months after initial installation
D.on or before the expiration date of the power source
第6题: