问题
选择题
To get fitter, you can do stomach exercises every day for half an hour. [ ]
A. at present
B. at least
C. at once
D. at last
答案
答案：B
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To get fitter, you can do stomach exercises every day for half an hour. [ ]
A. at present
B. at least
C. at once
D. at last
答案：B