Computers used to . In recent years, computer are being made .

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问题 Computers used to ______.
In recent years, computer are being made ______.

选项 A、smaller and cheaper
B、larger and more expensive
C、more difficult to use
D、to work more slowly

答案A

解析由文章第三句“But scientists and technicians have been making them smaller and cheaper while at the same time they have been easier to use”我们可以直接得到答案。

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