单项选择题

If the whole framework of the thesis ______ beforehand, a great deal of time and energy would have beeh saved.

A．was designed
B．had been designed
C．were designed
D．has been designed
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单项选择题
____ she realized she was in great danger.
A．No sooner the gangster took out the gun than
B．It was not until the gangster took out the gun that
C．Scarcely had the gangster took out the gun that
D．Hardly did the gangster took out the gun that
单项选择题
In the past decade skyscrapers have developed ______ in this newly emerging city.
A．homogeneously
B．simultaneously
C．spontaneously
D．anonymously
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