单项选择题

A．The air is heavily polluted.
B．She’d like to have the windows open.
C．She likes to have the air conditioner on.
D．The windows are already open.
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单项选择题
A．It is unfortunate they didn’t win the first prize.B．It is pitiful that they didn’t review their song often.C．They should have arrived earlier for the performance.D．They didn’t sing as well as they should.
A．It is unfortunate they didn’t win the first prize.
B．It is pitiful that they didn’t review their song often.
C．They should have arrived earlier for the performance.
D．They didn’t sing as well as they should.
单项选择题
A．Teacher-student.B．Master-maid.C．Mother-son.D．Husband-wife.
A．Teacher-student.
B．Master-maid.
C．Mother-son.
D．Husband-wife.
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