单项选择题

A．When she read the text.
B．When she asked a question.
C．When she explained the text.
D．When she turned to write something on the blackboard.
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单项选择题
A．If she earned more money, she’ d be able to save money.B．She didn’t save much of her salary.C．She spent her savings on summer housing.D．Her summer job didn’ t pay well.
A．If she earned more money, she’ d be able to save money.
B．She didn’t save much of her salary.
C．She spent her savings on summer housing.
D．Her summer job didn’ t pay well.
单项选择题
A．Greenhouse gases.B．Global warming.C．Change of agricultural zones.D．Change of climates.
A．Greenhouse gases.
B．Global warming.
C．Change of agricultural zones.
D．Change of climates.
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