{01}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
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。 本题选B。 {02}The engineers are so busy that they have zero time for outdoor sports activities, _____they have the interest.
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