问题
The missing boys were last seen ______ near the river.[ ]
A: playing
B: to play
C: play
D: to be playing
B: to play
C: play
D: to be playing
正确答案是：
同类题型
Do you like giraffes –Yes, I do. I think they’re _________.
Travelling from England toScotland you _______
lease let us, Mary and me, go toJack’s birthday party tomorrow, ______
______ do you go to the park —–Once a week.
Are you sure you are______?— Yes. I’ve been preparing for it all these days.[ ]