单项选择题

Please do not hesitate to call me if I can be of further assistance.

A. contact
B. see
C. help
D. touch
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单项选择题
In order to survive man needs to consume food and water.
A. work
B. play
C. live
D. walk
单项选择题
She seemed to have detected some anger in his voice.
A. noticed
B. heard
C. realized
D. got
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