单项选择题

Don't throw the papers into the rubbish. They () be valuable for others.

A. may
B. can
C. must
D. might

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单项选择题

Please don't give () my secrets.

A. up
B. off
C. in
D. away

单项选择题

Nick had an unusually clever mind, so his success had been () and never in doubt.

A. hoped
B. expected
C. promised
D. asked

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