题目
中学英语问题一道 ,
he _____ very hard because he looked very tired.
a must have worked
b had to work
c need have worked
d needed to work
he _____ very hard because he looked very tired.
a must have worked
b had to work
c need have worked
d needed to work
提问时间：2021-03-16
答案
A 肯定做过某事用must have done.这里的意思是,他肯定工作得非常辛苦因为他看起来很累.
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