单项选择题

A large ______ of money is spent on tobacco every year.

A．account
B．amount
C．number
D．quality
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单项选择题
They ______ TV for two hours.
A．had watched
B．are watching
C．watched
D．have been watching
单项选择题
The most appropriate title for this passage is ______.
A．The Invention of the Kite
B．The History of the Kite
C．The Kite and Science
D．Franklin's Experiment with Lightening
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