I spent half an hour( )this difficult math problem.A、having worked onB、to work

游客2024-01-17 75

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:http://tihaiku.com/zcyy/3371752.html

相关试题推荐

随机试题

最新回复(0)

Hefounditincreasinglydifficulttoread,______hiseyesightwasbeginningto