单项选择题

This exercise will be helpful for your health.

A. profitable
B. useless
C. beneficial
D. awful
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单项选择题
Please he patient to novices.
A. newcomers
B. carpenters
C. novelists
D. beginners
单项选择题
On Sunday afternoons, we always stroll along the river bank, chatting and laughing.
A. walk
B. run
C. sit
D. play
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