单项选择题

Why are you so late I _________for you all the time.

A．have been waiting
B．am waiting
C．have waited
D．will wait
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单项选择题
On April 1st they flew to Beijing, _________they stayed several days.
A．when
B．where
C．which
D．there
单项选择题
More and more trucks are seen _________between these two towns these days.
A．run
B．to run
C．be running
D．being run
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