填空题

58（）

【参考答案】

D

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Sign language is said to be very picturesque and exact and can be used internationally except for ()

A．spelling
B．ideas
C．whole words
D．expressions

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The most serious problem man is facing is thought to be ()

A．the using of the earth’s resources
B．the control over the waste of the natural materials
C．how to slow down the increase of population
D．how to stop the birth of new babies