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单项选择题

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A.She"ll type the documents for the man.
B.She"ll teach the man to operate the typewriter~
C.She doesn"t think the man"s sister is a good typist.
D.She thinks the man should buy a typewriter.
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单项选择题A.The use of new vending machines.B.The weight of the new coin.C.The impact on the stock market.D.The composition of the metal.

A.The use of new vending machines.
B.The weight of the new coin.
C.The impact on the stock market.
D.The composition of the metal.

单项选择题A.It was by continuous exploitation of the environment.B.It was by unceasing evolution.C.It was by lacking of competition between species.D.It was by chance initially and by cleverness now.

A.It was by continuous exploitation of the environment.
B.It was by unceasing evolution.
C.It was by lacking of competition between species.
D.It was by chance initially and by cleverness now.