单项选择题

You（）him so severely. It was none of his business.

A. needn't have scolded
B. needn't scold
C. mustn't have scolded
D. mustn't scold

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单项选择题

Ever since the rise of industrialism, education has been（）towards producing workers.

A. harnessed
B. hatched
C. motivated
D. geared

单项选择题

Malaria, it is tree, has been practically（）in thirteen countries, including the United States, and is under attack in many others.

A. wiped out
B. died out
C. put out
D. kept out

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