单选题
Exercise cart affect our outlook on life, and it can also help us get rid of tension, anxiety and frustration. So we should take exercise ______.
A、
regularly
B、
normally
C、
usually
D、
constantly
【正确答案】
A
【答案解析】
regularly定期地，经常地。normally正常地。usually通常地，平常地。constantly始终如一地，持续地。
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