单项选择题

The idea of a balanced diet is very difficult to ______ to anyone who knows nothing about food values.

A．put through
B．put across
C．put down
D．put up
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单项选择题
There are not many teachers who are strong ______ of traditional methods in English teaching.
A．sponsors
B．contributors
C．advocates
D．performers
单项选择题
The most ______ technological success in the twentieth century is probably the computer revolu- tion.
A．prominent
B．prosperous
C．solemn
D．prevalent
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