问题 选择题

How many words have you learned_____ you began to learn English?

A.for

B.if

C.before

D.since

答案

答案:C

题目分析:for为了,对于;if是否,如果;before在……之前;since自从……以来。句意:在你开始学英语之前,你已经学会了多少单词?结合语境可知选C。

单项选择题
单项选择题