单项选择题

(The Chinese) were the first and (large) ethnic(种族) group (to work) on the construction (of) the transcontinental railroad system.

A．The Chinese
B．large
C．to work
D．of
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单项选择题
The registrar(管注册的人) has requested that each student and teacher (sign) (their name) on the grade sheet before (submitting) (it).
A．sign
B．their name
C．submitting
D．it
单项选择题
(Historically) (there) (has been) (only) two major factions(部分) in the Republican Party -- the liberals and the conservatives.
A．Historically
B．there
C．has been
D．only
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