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.
A．They were used to prevent wild animals from attacking people.B．They were used to kee
A. They were used to prevent wild animals from attacking people.
B. They were used to keep wild animals from rushing onto the road.
C. They were used to prevent people from driving into forests.
D. They were used to keep people from having traffic accidents,
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