单项选择题

()much of their land is poor and only ten percent of the land can be cultivated, over ninety percent of the population are agricultural workers.

A.Except that
B.Although
C.Because
D.So far as

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单项选择题
We need a clever mind and a strong body as well.()

A.我们对聪明头脑的需要不像对健康身体的需要。
B.智慧对于头脑的就像健康对于身体一样。
C.我们不仅需要一个聪明的头脑,而且也需要一个健康的身体。
D.我们需要聪明的头脑和健康的身体。

单项选择题
A beam of light will not bend round comers unless made to do so with the help of a reflecting device.()

A.除非有反射装置的帮助,使得光线在拐弯处弯曲,不然光线是不会弯曲的。
B.光线在拐弯处将不会弯曲,除非在反射装置的帮助下使它弯曲。
C.如果不用反射装置使光线弯曲的话,光线在拐弯处是不会弯曲的。
D.即使有反射装置的帮助,光线在拐弯处也不会弯曲。

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