题目

题型：不详难度：来源：

You can only borrow two books ____________ if you don’t have a library card.
A. on time  B. in time 
. from time to time D. at a time

答案

D

解析

试题分析：句意：如果你没有图书卡你一次仅仅只能借阅两本书。A. on time按时B. in time 及时C. from time to time一次又一次D. at a time一次。根据句意，故选D。