单项选择题

According to Mr Schuman, how many skill areas are there in the world of work

A．less than 4,000
B．at least 500
C．at least 5,000
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单项选择题
A．viaB．duringC．per
A．via
B．during
C．per
单项选择题
Why does Mrs Carpenter put off her appointment
A．She was on a business trip.
B．She fell ill.
C．She was in a traffic jam.
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