单项选择题

A．Because all the trash cans are the same color.
B．Because not enough people volunteer to collect the trash.
C．Because most people don’’t like to sort their trash.
D．Because collections are not made on a regular basis.
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单项选择题
A．Make posters.B．Write a speech.C．Answer questions.D．Study chemistry.
A．Make posters.
B．Write a speech.
C．Answer questions.
D．Study chemistry.
单项选择题
A．The man is about to board the plane to Los Angeles.B．The man is going to take the next direct flight to San Francisco.C．The man wants to take a non-stop flight to San Francisco.D．The man wants to go to Los Angeles.
A．The man is about to board the plane to Los Angeles.
B．The man is going to take the next direct flight to San Francisco.
C．The man wants to take a non-stop flight to San Francisco.
D．The man wants to go to Los Angeles.
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