单项选择题

Mary is looking for the book she lost yesterday.

A．trying to find
B．looking up
C．looking at
D．finding
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单项选择题
The earth moves around the sun.
A．before
B．round
C．after
D．over
单项选择题
An important part of the national government is the Foreign Service, a branch of the Department of State.
A．tree
B．division
C．root
D．leaf
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