Every day students in our school will do outdoor activities ______ there is a heavy haze(雾霾).
| A．unless | B．while |
| C．until | D．since |
相关试题
We often play _____ volleyball for _____ hour every day.
| A．the; a | B．/; an | C．the; an | D．the; / |
单词辩音 在A、B、C、D四个选项中找出一个划线部分读音与其他三个不同的选项并将该选项填入答题卷上相应的空格内
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---When will Joe come here again?
--- Next Tuesday or Wednesday. It’s up _____ him.
A. On B. to C. for
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