A．For the sake of their health.B．For the maintenance of the heating or the air-conditi
A. For the sake of their health.
B. For the maintenance of the heating or the air-condition.
C. To make best use of their resources.
D. To make full use of the heating or the air-condition.
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【C5】
A. shining
B. glistening
C. glowing
D. flourishing
A．More than fifty percent.B．About forty percent.C．At least ten percent.D．Twenty or thi
A. More than fifty percent.
B. About forty percent.
C. At least ten percent.
D. Twenty or thirty percent.
【C8】
A. upset
B. supported
C. hurled
D. concealed
A．It was discovered by Spencer after he had made many experiments on microwaves.B．It w
A. It was discovered by Spencer after he had made many experiments on microwaves.
B. It was discovered by Spencer accidentally, when he was making scientific experiments.
C. It was discovered by Spencer, who devoted all his life to inventing a new way of cooking.
D. It was discovered by Spencer with the help of the company he was working for.
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