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In the 18th and 19th century, scientists the world many important discoveries.A.

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In the 18th and 19th century, scientists the world many important discoveries.A.

In the 18th and 19th century, scientists _______ the world _______ many important discoveries.

A.across, invented

B.throughout, made

C.all over, gave

D.over, had

试题答案

B