单项选择题

The most striking technological success in the 20th century is probably the computer revolution（）.

A．profitable
B．productive
C．prominent
D．prompt

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单项选择题

Innovative approaches to manufacturing, coupled with the tremendous size of the domestic market, led to the emergence of the United States as an industrial giant（）.

A．followed by
B．deriving from
C．combined with
D．mixed with

单项选择题

My parents moved out of their old home sometime last year after they had celebrated their 50th year there（）.

A．anniversary
B．years old
C．age
D．wedding

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