单项选择题

Which of the following do computers and high-tech tools NOT do in training American athletes()

A. Analyze performance.
B. Suggest ways to improve.
C. Eliminate the competition

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What happened to the man().

A. He had a traffic accident.
B. He was held up in traffic.
C. He was missing Michael.
单项选择题
It’s a long time since he left his England, ().

A. didn’t he
B. hadn’t he
C. wasn’t it
D. isn’t it
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