单项选择题

Each of those machines can only perform ______.

A．many operations
B．two operations
C．a single operation
D．none of operations
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单项选择题
What kind of robots does the man refer to
A．Agricultural robots.
B．Industrial robots.
C．Computers.
D．Electrical robots.
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.
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