问题
选择题
In order to ______ his muscle, Mike goes to the gym regularly to do exercise.
A．sharpen
B．brighten
C．strengthen
D．deepen
答案
答案：C
动词辨析。A使…锋利；B使…明亮；C加强；D加深；结合句意可知C正确。句意：为了加强他的肌肉，麦克去体育馆锻炼。
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