单项选择题

They are going to have the serviceman______an air-conditioner in the office next week.

A．install
B．to install
C．to be installed
D．installed
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单项选择题
Some companies have introduced flexible working time with less emphasis on pressure ______.
A．and more on efficiency
B．and more efficiency
C．than efficiency
D．than more on efficiency
单项选择题
Albert Einstein often stressed to interviewers that his accomplishments would certainly have been achieved by others______lived.
A．he had never
B．never had he
C．never he had
D．had he never
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