单项选择题

The building of the new road has been ________ by bad weather.

A．set down
B．held up
C．kept down
D．stood back
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单项选择题
Johnny had difficulty in learning English but he finally passed CET (Band 4) at the third ________.
A．attempt
B．display
C．process
D．trial
单项选择题
Before I noticed some small difference, I had thought that the two musical instruments were ________.
A．artificial
B．equivalent
C．identical
D．occasional
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