单项选择题

It was 12 o'clock ______ the plane took off.

A．when
B．that
C．since
D．till
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单项选择题
The country has ______ people and ______ money ______ spent on tobacco every year.
A．a large quantity of, a number of, are
B．plenty of, a great deal, are
C．a great deal of, plenty of, is
D．a large number of, a large amount of, is
单项选择题
The factory has done good honour to the government and the people around so that visitors come to it ______.
A．in number
B．in larger numbers
C．to the number
D．by number
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