单项选择题


A．frustrations
B．pets
C．insects
D．storms
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单项选择题
A．forB．ifC．althoughD．until
A．for
B．if
C．although
D．until
单项选择题
What is the main idea of the first paragraph
A．People do not always analyze the problem they meet.
B．People often accept the opinions or ideas of other people.
C．People may learn from their past experience.
D．People can not solve some problems they meet.
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