单项选择题

That was a difficult question, but Mary still（）to work it out.

A.did
B.failed
C.kept
D.managed

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A.My pleasure.
B.Never mind.
C.Quite right.
D.Don't thank me.

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单项选择题Thanks for the lovely and delicious food.（）

A.No thanks
B.Never mind
C.All right
D.My pleasure

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单项选择题Thank you very much for giving me so much help.（）

A.No thank you
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C.OK
D.Thanks

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