单项选择题

Since nobody is answering the phone, they（）

A. should have left
B. must have left
C. need have left
D. can have left

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Unexpectedly, he（）at her birthday party. All of us thought he wouldn't come.

A. turned up
B. turned down
C. turned in
D. turned out
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She said she（）many good friends since she came to this city.

A. has made
B. makes
C. had made
D. made
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