问题
选择题
I'm going to the supermarket this afternoon. Do you have anything _____? [ ]
A. to be buying
B. to buy
C. for buying
D. bought
答案
答案：B
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I'm going to the supermarket this afternoon. Do you have anything _____? [ ]
A. to be buying
B. to buy
C. for buying
D. bought
答案：B
，正电荷
，正电荷
，负电荷
，负电荷