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4. During the days ________, he worked as a servant at the Browns.

A. followed

B. following

C. to follow

D. that followed

答案：D.

專家解析：that followed是定語從句，關(guān)系代詞that在從句中作主語。

5. Is oxygen the only gas _______ helps fire burn?

A. that

B. /

C. which

D. it

答案： A.

專家解析：先行詞gas被the only修飾，關(guān)系代詞要用that，而不用which。

6. The clever boy made a hole in the wall, _______ he could see _____ was going on inside house.

A. which; what

B. through which; what

C. through that; what

D. what; that

答案：B.

專家解析：through which引導(dǎo)定語從句，through which即through the hole,在定語從句中作狀語。What引導(dǎo)的是see的賓語從句，并作從句的主語。

7. Is _______ some German friends visited last week?

A. this school

B. this the school

C. this school one

D. this school where

答案：B.

專 家解析：為便于理解，改寫本句話：This is the school that some German friends visited last week. 不難看出，作表語的the school是先行詞。that引導(dǎo)了定語從句，因?yàn)閠hat同時(shí)又作visited的賓語，所以被省略了。其它選項(xiàng)結(jié)構(gòu)不對。

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