单项选择题

The earth moves around the sun.

A．before
B．round
C．after
D．over
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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
单项选择题
Mary has made up her mind not to go to the meeting.
A．tried
B．promised
C．decided
D．attempted
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