题目内容
The graduating students are busy _______ material for their reports.
|
A.collect |
B.to collect |
C.collected |
D.collecting |
【答案】
D
【解析】略
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题目内容
The graduating students are busy _______ material for their reports.
|
A.collect |
B.to collect |
C.collected |
D.collecting |
D
【解析】略