单项选择题

______ the 8:20 bus because he didn’t leave home till 8:25.

A. couldn’t have caught
B. shouldn’t have caught
C. ought to have caught
D. must not have caught
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单项选择题
I should very much like to go to the party, but ______.
A. I am not invited
B. I have not been invited
C. I was not invited
D. I will not be invited
单项选择题
The woman over there is ______ mother.
A. Julia and Mary
B. Julia and Mary’s
C. Julia’ sand Mary’s
D. Julia’s and Mary
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