单项选择题

In a ______ to further his knowledge of the unknown, man has begun to explore the outer space.

A．quest
B．denial
C．notion
D．insight
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单项选择题
On a daily basis, how many passengers with serious in-flight medical problems call for pilots to turn the flight around
A．2.
B．4.
C．5.
D．14.
单项选择题
The word winded (Line 2, Para. 5) is close in meaning to _______.
A．changing direction
B．moving in a curving line
C．pausing for breath
D．turning back
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