Question

【题目】You can only borrow two books ____________ if you don’t have a library card.

A. on time B. in time

C. from time to time D. at a time

Answer 1

【答案】D

【解析】

试题分析：句意： 如果你没有借书证，你一次只能借两本书。A. on time按时；B. in time及时；C. from time to time不时地；D. at a time在一次。所以选D。