单选题
--Why do you go to work on foot ______? That doesn't seem to save your time.
--To get more exercise and keep healthy.
A、
all the time
B、
at times
C、
from time to time
【正确答案】
A
【答案解析】
[分析] all the time一直，始终；at times有时；from time to time不时地。A符合句意。
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