单项选择题

America will never again have as a nation the spirit of adventure as it ______before the west was settled.

A．could
B．would
C．was
D．did
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单项选择题
There was clearly nothing left to do but sit down on the shabby little couch and weep.______.
A．Did so Della
B．So did Della
C．Della so did
D．So Della did
单项选择题
It is due to the invention of the computer that man has been able to work so many wonders in the past few years. A case ______is the successful launching of space shuttle.
A．in point
B．in question
C．in a way
D．in brief
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