单项选择题

The doctor decided to test the chips himself because he believed that ______.

A．nobody would dare to try it
B．they can be used for identification purposes
C．it has been proved successful on animals
D．his patients expected him to experience it first

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热门试题

单项选择题

Guests who are unfamiliar with table manners often appear at dinner patties feeling ______.

A．improper
B．regretful
C．uncertain
D．dissatisfied

单项选择题

The writer wrote the text because he has noticed that good table manners ______.

A．are completely forgotten by young people
B．are brought back to people's attention
C．are used when making professional decisions
D．are difficult to learn and practise