单项选择题

Grandfather would (stay up) till small hours reading.

A．sit up
B．sit in
C．sit on
D．sit through
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单项选择题
She (undertakes) to verify the true source of the rumor.
A．tries
B．decides
C．promises
D．refuses.
单项选择题
Mr. Jackson wants to (give out) this news as soon as possible.
A．announce
B．emit
C．explain
D．finish
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