问题
选择题
Though it is very hot, I am busy writing materials for my students, only ____ once in a while to have some
water. [ ]
A. stopping
B. to stop
C. stop
D. stopped
答案
答案：A
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Though it is very hot, I am busy writing materials for my students, only ____ once in a while to have some
water. [ ]
A. stopping
B. to stop
C. stop
D. stopped
答案：A
