It"s no longer a question now _____ man can land on the moon.A．whenB．thatC．wheth
题型：不详难度：来源：
It"s no longer a question now _____ man can land on the moon.| A．when | B．that | C．whether | D．how |
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答案
| B |
解析
| 考查主语从句。本题的it是形式主语，真正的主语是that man can land on the moon,that引导起这个主语从句，在句中起连接作用，没有任何实际意义。 |
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It’s no longer a question now ______ man can land on the moon.| A．that | B．which | C．whether | D．what |
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