问题

The graduating students are busy _______material for their reports.
A:collect
B:to collect
C:collected
D:collecting
B:to collect
C:collected
D:collecting
正确答案是:
同类题型
A latest English newspaper, please!—Only one copy left. Would you like to have _______, sir
He had a good disguise, but as soon as he spoke he _____himself. [ ]
The pregnant woman is about to give birth to a baby, so we’d better ________ a doctor immediately.