单项选择题

The scientists have absolute freedom as to what research they think it best to ______.

A. engage
B. devote
C. seek
D. pursue
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单项选择题
She refused to ______ the door key to the landlady until she got back her deposit.
A. hand in
B. hand out
C. hand down
D. hand over
单项选择题
I deem the girl was in a bad health because the handshake with her was so ______.
A. limp
B. lame
C. soft
D. strong
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