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6. B

主語從句_____people with mental-health problem want缺少賓語，要用what引導，且充當want的賓語。故選B。

5. D

they thought 為插入語，可以去掉，則就可以看出賓語從句中缺少主語。whoever=anyone who。故選D。

4. B

主語從句____made things worse 缺少主語，應用what引導。that在名詞性從句中連接詞的作用，不充當任何成份。故選B。

3. B

at what time=when，引導賓語從句，when在從句中充當時間狀語。故選B。

2. B

　when引導表語從句，表示時間。故選B。

1．A

本題含有強調句型，若把It is···that去掉，則很容易地看出what引導的賓語從句，what在從句中充當主語。故選A。

40.　 ______ he met with the difficulty did he realize the importance of our help.

　 A. Even though　　 　B. Never until　　　 C. Only before　　　 D. Ever since

[答案與解析]

39. The women carrying babies , come in first ,　　　 　?

　　 A．will you 　　　　　　　 B．will they 　　　　　　 C．do you 　　　　　　　 D．don’t you

38．In no country other than Britain, it has been said, ____ experience four seasons in the 　course of a single day.

A. people can　　　　　 B. you can　　　 C. can it　　　　　　　　　　 D. can one

37. They have no idea at all ____.

A. what he is working on　　　　　　 B. what is he working on

C. what did he work on　　　　　　 D. what he is working