单项选择题

A．He sold traffic-counting system to local governments.
B．He dropped out of his law course at Harvard University.
C．He founded his own company--Microsoft Software company.
D．He devised an operating system for IBM.
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单项选择题
A．He was playing computer games with a few of his friends.B．He was playing basketball with a few of his friends.C．He was having a barbecue with a couple of friends.D．He was watching a game on TV with some friends.
A．He was playing computer games with a few of his friends.
B．He was playing basketball with a few of his friends.
C．He was having a barbecue with a couple of friends.
D．He was watching a game on TV with some friends.
单项选择题
A．On holiday.B．On business.C．The great lakes.D．In the office.
A．On holiday.
B．On business.
C．The great lakes.
D．In the office.
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