Students have to go back to dormitories ( ) 10:00 ,because they will close the gate at 10:00.A:by B:with C:after 从A/B/C中选择正确的答案填在括号里

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Students have to go back to dormitories ( ) 10:00 ,because they will close the gate at 10:00.A:by B:with C:after 从A/B/C中选择正确的答案填在括号里
Students have to go back to dormitories ( ) 10:00 ,because they will close the gate at 10:00.
A:by B:with C:after 从A/B/C中选择正确的答案填在括号里

Students have to go back to dormitories ( ) 10:00 ,because they will close the gate at 10:00.A:by B:with C:after 从A/B/C中选择正确的答案填在括号里
把A放在括号里
by +时间点表示在 这个时间以前.
after 表示在此之后.
题意来看,应该是在 10点之前回来,因为10点就关门了.
with 后面不能加时间点.

A
到……为止(根据后面的可知)
加油!不明白再问!如果帮到你,请采纳,谢谢!

by
在10:00之前

A, By
这里只有by符合题意, 10点钟以前

A(我们老师刚讲de)