________ in Tibet for ten years, he has been accustomed to the life and the clim

题型：不详难度：来源：

________ in Tibet for ten years, he has been accustomed to the life and the climate there.

A．He has worked	B．Having worked
C．He has been working	D．Working

答案

解析

略

举一反三

He got ____ when he tried to save the child from the ___ house.

A．to burn, burning

B．a burn, burnt

C．burning, burned

D．burned, burning

题型：不详难度：| 查看答案

Easter Island, which was almost uninhabited when it was discovered on Easter Day in 1722 by a Dutch captain, is covered with hundreds of giant statues, each _______ several tons.

A．weighing

B．weighs

C．weighed

D．to weigh

题型：不详难度：| 查看答案

. Many experts agree that once these treasures are _______ to the air, great harm will be done to them. So they think it better not to unearth the treasures.

A．exposed

B．threatened

C．constructed

D．conserved

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_______ enough is quite necessary for your health, so you shouldn’t stay up too late every day.

A．Sleep

B．Sleeping

C．To sleep

D．Having slept

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It doesn’t matter what style is in fashion this year. It is up to you to decide what _____.

A．to be worn

B．to wear

C．to be wearing

D．being worn

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