单项选择题

As a () major, he enjoyed working in the steel plant.

A. metallurgy
B. geology
C. astronomy
D. seismology

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单项选择题
We have many holidays from the end of March till the beginning of April They are the best days for ().

A. blade
B. coincidence
C. balcony
D. entertainment
单项选择题
Nor has Washington yet () to Mexican demands for a treaty specifying extradition for U. S. officials who disregard the new stricture.

A. profaned
B. contemplated
C. acceded
D. manipulated
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