语法与词汇

Which of the following sentences contains a subject clause?

A、 He said that he would try every means to get that letter.
B、 That he is not an American citizen prevents him from participating that organization.
C、 The problem is when we can get a pay rise.
D、 When he came to town, we always had dinner together.

【正确答案】 B

【答案解析】

题干的意思是：下列哪个句子包含主语从句。选项B中that引导的部分是prevent的主语，因此是主语从句。选项A中that引导的部分是said的宾语，因此是宾语从句。选项C中when引导的是is的表语，因此是表语从句。选项D中when引导的是时间状语从句。因此，本题的正确答案为B。