题目列表(包括答案和解析)
He didn’t explain _______ why he was late, which made us unhappy.
A. of us B. us C. for us D. to us
He didn’t explain __________ why he was late, which made us unhappy.
A. of us B. us
C. for us D. to us
A. of us B. us
C. for us D. to us
He didn’t explain _______ why he was late, which made us unhappy.
| A．of us | B．us | C．for us | D．to us |
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