问题
选择题
The teacher told us not to take the equipment out of the laboratory until ______.[ ]
A. allowed to
B. allowing to
C. allowing to take
D. allowed to be taken
答案
答案：A
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The teacher told us not to take the equipment out of the laboratory until ______.[ ]
A. allowed to
B. allowing to
C. allowing to take
D. allowed to be taken
答案：A