问题
选择题
______ it is important to have enough exercise, many people find the excuse that they can't find the time. [ ]
A. When
B. That
C. While
D. As
答案
答案：C
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______ it is important to have enough exercise, many people find the excuse that they can't find the time. [ ]
A. When
B. That
C. While
D. As
答案：C