单项选择题

The author thinks that______.

A．it is impossible that we encounter some alien form of life
B．life only exists on Earth
C．it is likely that we' ll encounter some alien form of life
D．beings from outer space will never visit the earth

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单项选择题

According to the writer, one can offer to invite a client to lunch______.

A．when there are sales to be dune
B．when the client feels hungry
C．at an ordinary weekend
D．on the client's birthday

单项选择题

Daring a business lunch it' s important to______.

A．make a deal with the client
B．order nice, expensive food
C．be a good listener
D．inquire after the client' s health