单项选择题

It is sometimes claimed that America is a （）pot of different races.

A. burning
B. burnt
C. melting
D. melted

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I wish I （）to the movies with you last night.

A. have gone
B. could go
C. could have gone
D. went
单项选择题
There seems to be no alternative but （）the offer.

A. accept
B. to accept
C. accepting
D. having accepted
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