单项选择题
For years, astronomers struggled to calculate the age of the universe.
A.多年以来,宇航员们在努力计算宇宙存在的时间。
B.多年以来,宇航员们在努力地探索,力求揭开宇宙的年龄之谜。
C.多年以来,宇航员们在挣扎地探索,力求揭开宇宙的年龄之谜。
D.多年以来,宇航员们在努力地计算宇宙的年龄现象。
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单项选择题
There are few places in this country ______ wheat can't grow well.
A.where
B.which
C.when
D.if
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单项选择题
We are sure that the business between us will be promoted in years to come.
A.我们相信,我们之间的生意在未来的几年将受到促进。
B.我们肯定,在我们之间的商业将会受到推动,在若干年里将来临。
C.我们深信,我们之间的商业将随着时间的推移而得到增进。
D.我们相信,我们之间的业务将在今后的几年得到发展。
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