单项选择题

—Bob doesn't seem like the same person.
— ()so much in the accident has made him more sentimental.

A.For him to see
B.His seeing
C.Having seen
D.To be seeing

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单项选择题

—Such a stupid mistake could have been avoided. —Unfortunately, he()the mistake again and again.

A.repeated
B.would repeat
C.had repeated
D.would have repeated

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