2. 外语
  3. I spent half an hour( )this difficult math problem.

I spent half an hour( )this difficult math problem.

admin2017-03-25  39
问题 I spent half an hour( )this difficult math problem.
选项 A、having worked on
B、to work on
C、on work
D、working on
答案D
解析 习惯用法。spend some time(some money)in doing sth．(on sth．)，如：She spent the whole afternoon shopping．她一下午都在购物。
转载请注明原文地址:https://kaotiyun.com/show/V6CO777K
0

成人本科学位英语

相关试题推荐
随机试题
最新回复(0)