问题
选择题
I went ______a balloon but I didn’t see anyone _____ balloons.
A．to buy, to sell
B．to buy, selling
C．buying, selling
D．buying, to sell
答案
答案：B
本题考查动词及非谓语动词。句中go to do去做某事，see sb doing看到某人做某事。句意：我去买气球，但我没有看到任何人卖气球。