单项选择题

Questions 19-22 are based on the following dialogue: What do we learn about the use of solar energy in the U. S.

A．It is very well established.
B．It is relatively new.
C．It is found in one million homes.
D．It is being rapidly expanded.
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单项选择题
What can be inferred about the lab
A．It’s closed on Mondays.
B．The man doesn’t like working there.
C．It’s supposed to be open now.
D．The man locked it at 10:00.
单项选择题
When did the woman want the store to deliver the items
A．In about 20 years.
B．Within a week.
C．In a couple of weeks.
D．As early as possible.
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