单项选择题

A．Attention problems.
B．Participating problems.
C．Communication problems.
D．Speaking problems.
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单项选择题
A．She thought it was expensive.B．She thought it took less time.C．She thought it was long and tiring.D．She felt quite all right.
A．She thought it was expensive.
B．She thought it took less time.
C．She thought it was long and tiring.
D．She felt quite all right.
填空题
Brownfield epidemic directly influences American economy.
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