不少同學反映英語語法中，最難學的是定語從句。

可不是嗎?關于定語從句的兩大分支：限制性定語從句與非限制性定語從句，都繞暈了不少同學，想要學好這兩大分支，不妨來測試下你究竟掌握得如何？

1.She heard the terrible noise, ________brought her heart into her mouth.

A. it B. which C. this D. that

答案：B

【解析】后半句為非限制性定語從句，盡管先行詞noise屬于事物，也不能用that而要用which來引導。which指代noise，在從句中作主語。

2.Recently I bought an ancient Chinese vase, ________was very reasonable.

A. which price

B. the price of which

C. its price

D. the price of whose

答案：B

【解析】whose在從句中作表示所屬關系的定語，既可指代人，也可指代物。指物時，?？赊D換為of which；指人時常可轉換為of whom。

3.In the office I never seem to have time until after 5:30 pm,______many people have gone home.

A. whose time

B. that

C. on which

D. by which time

答案：D

【解析】 先行詞5:30 pm與time之間是一種同位關系，可用which來作定語替代。從句中的完成狀態(tài)，常與by短語連用。故選D。

4.Dorothy was always speaking highly of her role in the play, of course,________made the others unhappy.

A. who

B. which

C. this

D. what

答案：B

【解析】指代“Dorothy總是高度評價自己在那場戲中所擔任的角色”的整個事件。

5.Carol said the work would be done by October,________personally I doubt very much.

A. it

B. that

C. when

D. which

答案：D

【解析】表示時間的名詞October，用“我個人非常懷疑”來修飾，意思不通。應該修飾整個主句， 表示對“Carol說在十月前能做好這項工作”懷疑。故選D。

6._______is known to everybody, the moon travels round the earth once every month.

A. It B. As C. That D. What

答案：B

【解析】逗號表明為非限制性定語從句。。

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