单项选择题

Questions 19 to 22 are based on the conversation you have just heard.

A．Due to powerful winds.
B．Due to the underestimation of wind.
C．Because they take risks.
D．Because they have no skills.
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单项选择题
A．Find another computer.B．Fix the computer herself.C．Find someone to fix the computer.D．Wait a second for the computer to boot.
A．Find another computer.
B．Fix the computer herself.
C．Find someone to fix the computer.
D．Wait a second for the computer to boot.
单项选择题
A．People are driving cars with electricity.B．Scientists are producing cleaner energies.C．Factories are installing smoke-cleaning equipment.D．People are using new materials which don’t need to be burned.
A．People are driving cars with electricity.
B．Scientists are producing cleaner energies.
C．Factories are installing smoke-cleaning equipment.
D．People are using new materials which don’t need to be burned.
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