Don’t use words, expressions or phrases _____ only to people with specific knowl

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Don’t use words, expressions or phrases _____ only to people with specific knowledge.

A．being known

B．having known

C．to be known

D．known

答案

解析

略

举一反三

There is a new problem involved in the popularity of private cars _____ road conditions need _____.

A．that, to be improved	B．which, to be improved
C．where, improving	D．when, improving

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According to a recent U.S. survey, children spent up to 25 hours a week _____ TV.

A．to watch

B．to watching

C．watching

D．watch

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The disc, digitally _____ in the studio, sounded fantastic at the party.

A．recorded	B．recording
C．to be recorded	D．having recorded

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Having been attacked by terrorists, _____.

A．doctors cane to their rescue	B．the tall building collapsed
C．an emergency measure was taken	D．warnings were given to tourists

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_____ into use in April 2000, the hotline was meant for residents reporting water and heating supply breakdowns.

A．Put

B．Putting

C．Having put

D．Being put

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