单项选择题


Questions 22 to 25 are based on the conversation you have just heard.

A．The Net is not healthy for people.
B．The Net does not help with people’s communication.
C．The Net is healthier than TV.
D．The Net does no good to people’s psychological well-being.
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单项选择题
What is the principal constituent of natural gas
A．Carbon and hydrogen.
B．Methane and other hydrocarbon gases.
C．Saturated hydrocarbons.
D．Non-associated gas.
单项选择题
A．Because this will help them catch criminals.B．Because this will help them control the crime rate.C．Because this will help them reduce the number of lawsuits.D．Because this will help them save much manpower and time.
A．Because this will help them catch criminals.
B．Because this will help them control the crime rate.
C．Because this will help them reduce the number of lawsuits.
D．Because this will help them save much manpower and time.
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