单项选择题

There ______ that you must keep in mind while dealing with this problem.

A．is one or two points
B．are one or two points
C．is a point or two points
D．are a point and two points
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单项选择题
The higher the standard of living and greater the national wealth, the ______.
A．greater is the amount of paper is used
B．greater the amount of paper is used
C．greater amount of paper is used
D．amount of paper is used is greater
单项选择题
Only when I watched TV last night ______ what ______.
A．I learned / was happening
B．did I learn / had happened
C．learned I / had happened
D．did I learn / would happen
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