单项选择题

What do you think of his proposal that improvements ______ in the old type of vacuum cleaner

A. be made
B. will be made
C. would be made
D. will have to be made
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单项选择题
________enough time and money, the researchers would have been able to discover more in this field.
A．Giving
B．To give
C．Given
D．Being given
单项选择题
We had to wait some time before the menu was brought to us and our orders ______.
A. taken
B. given
C. done
D. made
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