不少同学反映英语语法中，最难学的是定语从句。

可不是吗?关于定语从句的两大分支：限制性定语从句与非限制性定语从句，都绕晕了不少同学，想要学好这两大分支，不妨来测试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】后半句为非限制性定语从句，尽管先行词noise属于事物，也不能用that而要用which来引导。which指代noise，在从句中作主语。

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在从句中作表示所属关系的定语，既可指代人，也可指代物。指物时，常可转换为of which；指人时常可转换为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】 先行词5:30 pm与time之间是一种同位关系，可用which来作定语替代。从句中的完成状态，常与by短语连用。故选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总是高度评价自己在那场戏中所担任的角色”的整个事件。

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】表示时间的名词October，用“我个人非常怀疑”来修饰，意思不通。应该修饰整个主句， 表示对“Carol说在十月前能做好这项工作”怀疑。故选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】逗号表明为非限制性定语从句。。

以上的这些题目，大家做对了几道题？要是有做错的题目仔细地看下题型解析再巩固下语法知识。最后小编希望大家每天练习一点，坚持就有成果。加油练习吧。