专四专八

76. Nowhere in nature is aluminum found free, owing to its always with other elements, most commonly with oxygen.

A. being combined　B. having combined

C. to combine　D. combined

77. Physics is the present day equivalent of used to be called natural philosophy, from most of present-day science arose.

A. which, what　B. that, which　C. what, which　D. what, that

78. On no account ever leave the baby at home alone.

A. should you　B. you should　C. shall you　D. you shall

79. the center of our planetary system was considered as heresy by the church in the Middle Ages.

A. It is the sun and not the earth is

B. That the sun and not the earth is

C. Being the sun and not the earth is

D. The sun and not the earth is

80. The reason that his property was confiscated by the country, it , was that he was involve in a lot of fraudulent activities during the war.

A. was turned out　B. was being turned out　C. being turned out　D. turned out

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