单项选择题

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now listen to the conversation.
The computer sends signal in the form of ______.

A．electrical impulses
B．machines
C．instructions
D．automatic impulses
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单项选择题
Why didn’t the man watch TV a lot when he was young
A．He had too many half-brothers, half-sisters, step-brothers and step-sisters at home.
B．He didn’t like to watch TV a lot.
C．The TV set in his family was a black-and-white one.
D．The TV set in his family didn’t work properly.
单项选择题
According to the conversation, what are the experts now recommending
A．Exercising the entire body.
B．Having your blood pressure taken daily.
C．Losing weight prior to exercising.
D．Weighing in before each exercise session.
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