单项选择题

A．The machine isn’t working.
B．They can’t decide on a video.
C．Susan’s mother is going to use it.
D．Susan has to finish her assignment.
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单项选择题
A．Because nearly 1,000 million acres of land was burned off.B．Because natural resources are being used up.C．Because animals and plants are in danger of extinction.D．Because natural beauty of the land would be ruined.
A．Because nearly 1,000 million acres of land was burned off.
B．Because natural resources are being used up.
C．Because animals and plants are in danger of extinction.
D．Because natural beauty of the land would be ruined.
单项选择题
A．Their competitors have long been advertising on TV.B．TV commercials are less expensive.C．Advertising in newspapers alone is not sufficient.D．TV commercials attract more investments.
A．Their competitors have long been advertising on TV.
B．TV commercials are less expensive.
C．Advertising in newspapers alone is not sufficient.
D．TV commercials attract more investments.
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