Our class discussed the question of __________it is necessary for us students to
题型：不详难度：来源：
Our class discussed the question of __________it is necessary for us students to use mobile phones on campus. | A．if | B．where | C．whether | D．that |
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答案
| C |
解析
本题考查宾语从句。句意：我们班上讨论了我们的学生在校园是否有必要使用手机的问题。
结合句意可知of后接宾语从句，有“是否”的含义，故用whether。介词后的从句不用if引导。 |
举一反三
Robert failed to complete his education____ he found it hard to focus on his studies.| A．although | B．if | C．because | D．while |
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, and we each can have one.| A．A few more books | | B．Giving us a few more books | | C．To give us a few more books | | D．Given us a few more books |
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Edison was a clever boy, and ______ he was fourteen, he had learned advance mathematics by himself. | A．whenever | B．by the time | C．the moment | D．ever since |
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Leave your key with your neighbor _you lock yourself out one day.| A．as long as | B．in case | C．even though | D．as if |
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It sounds like something is wrong with the car’s engine. _____ , we’d better take it to the garage immediately.| A．Otherwise | B．If not | | C．But for that | D．If so |
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