单项选择题

The teacher told the children there ________ four seasons in a year: spring, summer, autumn and winter.

A． is
B．was
C．are
D．were
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单项选择题
They usually have less money at the end of the month than ________ at the beginning.
A． which
B．which was
C．they have
D．it is
单项选择题
After a long and tiring journey, they arrived ________.
A．till the last
B．at last
C．by the end
D．at the end
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