单项选择题
Without computer, we ______ great progress in the last decades.
A.would not make
B.will not make
C.could not make
D.should not have made
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写信邀请你的朋友参加你的生日聚会。信的内容包括:1.告知对方聚会的具体时间、地点;2.到达聚会地点的行车路线以及便利的交通工具;3.要求对方就是否能参加聚会作回答。
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单项选择题
This is one of the longest bridges that ______ on this river.
A.is ever built
B.has ever been built
C.was ever built
D.has ever built
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