单项选择题

Mary is looking for the book she lost yesterday.

A. trying to find
B. trying to read
C. trying to buy
D. trying to borrow
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单项选择题
The Foreign Service is a branch of the Department of State.
A. center
B. division
C. root
D. base
单项选择题
Our English teacher is sick.
A. fat
B. weak
C. ill
D. mad
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