填空题


【参考答案】

in→at
介词错误。“以……的速度”应是at a speed of,所以应将in改为at。
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单项选择题
A.They need new materials made from garbage.B.The garbage makes their environment more and more dirty.C.Their traditional ways of dealing with wastes are not efficient.D.They find some materials useful.
A.They need new materials made from garbage.
B.The garbage makes their environment more and more dirty.
C.Their traditional ways of dealing with wastes are not efficient.
D.They find some materials useful.
单项选择题
A.Borrow a book somewhere else.B.Take a book from the reading-room.C.Use a book of his own.D.Buy a book of his own.
A.Borrow a book somewhere else.
B.Take a book from the reading-room.
C.Use a book of his own.
D.Buy a book of his own.
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