Much time ___(spend) doing his homework last night

问题描述:

Much time ___(spend) doing his homework last night

考察被动的用法
有last night 故用过去式
was spent

spent 由last night判断

Much time does speng__ doing his homework last night

这是昨晚发生的事情,所以用过去式
时间是被花费的,所以要用被动,且时间是单数
所以应该填
was spent