1.She lived in the mountain village ___the years 1940-1950.

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a.between b.during c.in d.since

2.The American Civill War lasted four years before the north won ____the end.
a.by b.at c.in d.on

3.May had finished her homework ____the time I got home.
a.until b.by c.at d.when

4.We stayed at the lab ____our teacher returned.
a.till b.by c.during d.while

5.Don't worry.He will return ____.
a.before long b.long before c.long long ago d.long ago

6.there lived an old man,fishing at sea ____.
a.long before b.begore long c.long time ago d.soon

7.I was told that his uncle had gone to france _____.
a.long before b.shortly after c.before long d. long ago

8._____Tom gets up at five in the morning.
a.sometime b.sometimes c.some time d.some times

9.I remember we met each other ___last year.
a.sometime b.some times c.some time d.sometimes

10.May and I have been to the Great Wall ___.
a.sometime b.some time c.sometimes

1.A since多表示完成时
2.C(不确定)on the end上月底 by the end年底 at the end后面要加介词of
in the end最终
3.B 4.A till和until用在肯定句式,主句谓语为延续性动词,表示延续到till/until表示时间就停止
5.A 6.A 7.A(不确定)long before很久以前 before long不久
8.B 9.B 10.不知道 some time一段时间 sometimes有时 some times几次
sometime某个