单项选择题

The man want to know ______

A．how long the show will last
B．how to avoid lead poisoning
C．how the skyscraper was built
D．how glass and crystal differ
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单项选择题
The couple always go out ______
A．on Friday
B．on Saturday
C．on Sunday
D．any weekday
单项选择题
Integrated circuit, color TV, mobile phones, and automatic data processing equipment accounted for ______ of the hi-tech exports.
A．26.8 percent
B．12 percent
C．27.3 percentage
D．58.5 percent
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