题目内容

______his return from Japan, Professor Li went directly to his laboratory and started working with his colleagues.

A. Upon
B. At
C. Within
D. Over

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The word "walloped" (Line 3, Paragraph 1) most probably means "______".

A. decreased
B. affected
C. increased
D. hit

在国家出现紧急状态或者非常情况时，或者为了公共利益的目的，国务院专利行政部门可以给予实施发明专利或者实用新型专利的强制许可。()

______plastics, the machine is light in weight.

A. Made of
B. Having made with
C. To make of
D. To be made of

In a quiet courtroom tucked away in a federal building here, a titanic battle is competing