Sorry to give you so much trouble.（）

—Excuse me，how much is the jacket？—It’s 499Yuan.（）.

A.Oh，no.That’s OK!
B.Would you like to try it on？
C.Which do you prefer？
D.How do you like it？

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Just as I was leaving the house，it occurred to me that I （）to take my keys.

A.have forgotten
B.had forgotten
C.must have forgotten
D.should have forgotten

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