单项选择题

A．It has so many useful websites to classify.
B．Chatting on the Net really takes a lot of time.
C．Useful websites are not available in a search.
D．Too many useless’ sites make it longer to find things.
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单项选择题
A．By listening to documentaries.B．By watching TV commercials.C．By watching foreign movies.D．By listening to foreign songs.
A．By listening to documentaries.
B．By watching TV commercials.
C．By watching foreign movies.
D．By listening to foreign songs.
单项选择题
A．The government has adopted many effective ways to stop pollution.B．The government can’t prevent pollution completely because of development.C．There are no effective purifying devices to prevent or stop pollution.D．The government won’t control pollution even for tile sake of people’s health.
A．The government has adopted many effective ways to stop pollution.
B．The government can’t prevent pollution completely because of development.
C．There are no effective purifying devices to prevent or stop pollution.
D．The government won’t control pollution even for tile sake of people’s health.
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