单项选择题

A．Last night.
B．Tonight.
C．Yesterday afternoon.
D．This mornin
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单项选择题
A．He me all the food.B．lie cleaned the refrigerator.C．He worked day and night.D．lie had a big lunc
A．He me all the food.
B．lie cleaned the refrigerator.
C．He worked day and night.
D．lie had a big lunc
单项选择题
According to the passage, what is one disadvantage of skyscrapers that have mirrored walls
A．The exterior surrounding air is heated.
B．The building materials are very expensive.
C．Construction time is increased.
D．Extra air- conditioning equipment is neede
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