(2013·凉山一模)Life is like riding a bicycle. ________ your balance, you must keep m

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(2013·凉山一模)Life is like riding a bicycle. ________ your balance, you must keep moving.

A．Keeping	B．To keep
C．Keep	D．Being kept

答案

解析

B　句意：生活就像在骑自行车。为了保持平衡，你必须不断前进。根据句意可知此处需用不定式作目的状语，故选B项。

举一反三

___ in London, the penniless American wandered on the pavement, ___ to find a job to make a living.

A．Lost; hoped

B．Losing; hoped

C．Lost; hoping

D．Losing; hoping

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“You can’t catch me!” Janet shouted, ___ away.

A．run

B．running

C．to run

D．ran

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The crowd cheered wildly at the sight of LiuXiang, who was reported __ the world record in the 110- meter hurdle race.

A．breaking

B．having broken

C．to have broken

D．break

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___ the project as planned, we’ll have to work two more hours a day.

A．Completing

B．Complete

C．Completed

D．To complete

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I like getting up very early in summer. The morning air is so good ___.

A．to be breathed

B．to breathe

C．breathing

D．being breathed

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