问题
选择题
Proper exercise is good for your health._____, too much is bad for it.
A．Therefore
B．But
C．However
D．while
答案
答案：C
考查副词的用法。由空格后的逗号看出，此处需要一个副词，依据句意表转折，故选C；but和while都是连词。
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Proper exercise is good for your health._____, too much is bad for it.
A．Therefore
B．But
C．However
D．while
答案：C
考查副词的用法。由空格后的逗号看出，此处需要一个副词，依据句意表转折，故选C；but和while都是连词。