问题
选择题
During the period when he was injured,Yao Ming did a lot of exercise to _____ his arm muscles. [ ]
A. stress
B. affect
C. strengthen
D. decide
答案
答案：C
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During the period when he was injured,Yao Ming did a lot of exercise to _____ his arm muscles. [ ]
A. stress
B. affect
C. strengthen
D. decide
答案：C