单项选择题

We are flying at a(an) ______ of 20,000 feet.

A．altitude
B．aptitude
C．latitude
D．attitude
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单项选择题
The young writer is not ______ presently, but he will be well known to the world someday.
A．significant
B．dominant
C．magnificent
D．prominent
单项选择题
Comparison and contrast are often used ______ in advertisements.
A．intentionally
B．pertinently
C．incidentally
D．tiresomely
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