单项选择题

Sorry, I'm late. I was delayed by a traffic ______.

A．block
B．jam
C．trouble
D．injury
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单项选择题
The new building is said ______ by the end of next month.
A．to finish
B．to be finished
C．to have finished
D．being finished
单项选择题
The longer I worked with Mr. Smith, the more I realized ______ in computer technology.
A．how skillful he was
B．how was he skillful
C．how he was skillful
D．how skillful was he
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