单项选择题


Questions 17--20 are based on the following passage. You now have 20 seconds to read Questions 17--20.
"Expenditure" means

A．exercise.
B．expense.
C．style.
D．cost.
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单项选择题
A．recoverB．turnC．rebuildD．restore
A．recover
B．turn
C．rebuild
D．restore
单项选择题
Why was Kohoutek referred to as the comet of the century
A．It was thought to be extremely old.
B．It passes the Earth once a century.
C．Scientists predicted it would be very bright.
D．Scientists have been tracking it for a century.
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