The father stayed up late, ______ a long letter to his son.A．to writeB．writingC．

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The father stayed up late, ______ a long letter to his son.

A．to write

B．writing

C．wrote

D．was writing

答案

解析

略

举一反三

_____ with terror, the dog hid himself in a small cave, _____ his tail to the rain.

A．Trembling; exposed	B．Trembled; exposed
C．Tremble; exposed	D．Trembling; exposing

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______ worried her mother a lot.

A．Kate’s left home alone	B．Kate left home alone
C．Kate leaving home alone	D．Kate’s leaving home alone

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The whole hall wants ______.

A．to be cleaning	B．to be cleaned
C．being cleaned	D．to clean

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____ the old mother’s deeds, all of us couldn’t keep back our tears and began to cry.

A．Moved by

B．Moving with

C．To be moved by

D．To be moving by

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________ from space, the earth , with water_______ seventy percent of the surface , looks like a blue ball.

A．Seen ; covered	B．Seen ; covering
C．seeing ; covering	D．Seeing ; covering

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