It may be 5 or 10 years __________ it is possible for people to find a space sta
题型：不详难度：来源：
It may be 5 or 10 years __________ it is possible for people to find a space station on the moon.| A．since | B．before | C．after | D．when |
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答案
| B |
解析
试题分析：考查连词和句型：A. since 自从，B. before 在…前面，C. after在…后面，D. when当…时候，句意：可能还要5-10年人们才能发现月球上有个太空站。使用了句型：It may be+一段时间+before….“要…长时间才能够”，选B。 |
举一反三
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