请教:2009年12月大学英语三级考试A级真题第2大题第2小题如何解答?【题目描述】17. She didn’t know ________ to express her ideas in English clearly in public.A) whichB) whyC) whatD) how

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第19题：Thinking that you know __________ in fact you don\'t is not a good idea.

A. what                 B. that

C. when                 D. which

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Directions: This part is to test your ability to construct grammatically correct sentences. It consists of 2 sections.

Section A

Directions: In this section, there are 10 incomplete sentences. You are required to complete each one by deciding on the most appropriate word or words from the 4 choices marked A), B), C) and D). Then you should mark the corresponding letter on the Answer Sheet with a single line through the center.

16. Most of the retired people are happy ________ their quiet life in the country- side.

A) to

B) of

C) with

D) on

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第17题：In learning English we should not __________ our students of their mistakes all the time.

A. remind           

B. remember

C. remain               

D. remark

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21. Would you please pass me the book ________ cover is black?

A) which

B) whose

C) that

D) its

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第23题：The old lady ________ on hearing his son’s death. A. broke in B. broke down C. broke out D. broke away