The city is known for two famous revolutions.A．witnessB．witnessingC．being

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The city is known for two famous revolutions.

A．witness

B．witnessing

C．being witnessed

D．having been witnessing

答案

解析

略

举一反三

She couldn’t help, even though she tried not to, ____ at the strange clothes her friend was wearing.

A．to laugh

B．laugh

C．laughing

D．laughed

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by the success of his friend, hw was bent on seeking his fortune in busy cities.

A．Being encouraged	B．To be encouraged
C．Having encouraged	D．Encouraged

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how to solve the problem, the little boy turned to his father for help.

A．Not knowing	B．Having not known
C．Not having been known	D．Not known

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Some people are sitting on the grass; others are walking along the lake, ______ .

A．chatting and to laugh	B．to chat and to laugh
C．chatting and laughing	D．chatted and laughed

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______ by many well-known experts and film stars, the product was very popular at one time.

A．To advocate

B．Having advocated

C．Advocating

D．Advocated

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