单项选择题

—I wonder why Mr. Brown hasn’ t showed up at the meeting yet.
—I’ m not sure, but he ______ in a traffic jam driving here.

A) could be stuck
B) might stuck
C) might have been stuck
D) must have stuck
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单项选择题
A．Strangers.B．Colleagues.C．Interviewer and interviewees.D．Classmates.
A．Strangers.
B．Colleagues.
C．Interviewer and interviewees.
D．Classmates.
填空题
The word horsepower was first used two hundred years ago. James Watt had made the world’ s first (11) used steam engine. He had no way of telling people (12) how powerful it was, for at that time there were no units for measuring power. Watt decided to (13) how much work one (14) horse could do in one minute. He called that unit one horsepower. With this unit he could measure the work his steam engine could do. He (15) that a horse could lift a 3,300-pound weight 10 feet into the air in one minute. His engine could lift a 3, 300-pound weight 100 feet in one minute. Because his engine did ten times as much work as the horse, Watt called it a ten horsepower engine.
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