单项选择题

The recent medical breakthrough was the culmination of many long years of experimentation.

A.result
B.climax
C.abyss
D.cultivation
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单项选择题
Flu shots are given every fall as a precaution against an epidemic the following winter.
A.required treatment
B.free service
C.preventive measures
D.new therapy
单项选择题
Man: I notice you don't buy your lunch in the cafeteria any more. Woman: When prices went up,I decided to bring my own. Question: Why doesn't the woman buy food in the cafeteria
A.She is on a special diet.
B.She doesn't like to walk to the cafeteria.
C.She thinks the cafeteria is too expensive.
D.She doesn't eat lunch anymor
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