Though expensive，a coat made of synthetic material lasts longer than （）made of cloth.

I didn’t hand in my term paper yesterday although I （）.That’s why I feel so guilty now.

A.would
B.should
C.had to
D.had better

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-I’m so glad to have got recovered so soon with your help.Thank you very much，Dr.Brown!-（）.

A.You’re welcome
B.With pleasure
C.Not at all
D.My duty

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