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单项选择题

A．There are no rapids or waterfalls.
B．There is a constant, strong wind.
C．Navigation is rather difficult.
D．Frequent storms cause problems for riverboats.
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热门试题

单项选择题A．Because the old one didn’t work well. B．Because the new TV set was on sale. C．Because he had moved into a bigger house. D．Because he wanted to surprise the woman.

A．Because the old one didn’t work well.
B．Because the new TV set was on sale.
C．Because he had moved into a bigger house.
D．Because he wanted to surprise the woman.

单项选择题A．Problems with the teachers. B．Problems with family members or friends. C．Problems with classmates’ making fun of her. D．Problems with a part-time job.

A．Problems with the teachers.
B．Problems with family members or friends.
C．Problems with classmates’ making fun of her.
D．Problems with a part-time job.