all the homework assigned by the school the students have to work at it till midnightA．CompletingB．To completeC．Having completedD．To have completed 题目和参考答案——青夏教育精英家教网—

题目内容

______all the homework assigned by the school the students have to work at it till midnight

A．Completing

B．To complete

C．Having completed

D．To have completed

试题分析：句意：为了完成学校布置的全部的家庭作业，学生们不得不学习到了午夜。表示目的，为了……，故用不定式，且与谓语动词表示的动作没有时间的先后顺序，故用不定式的一般式，选B。

练习册系列答案

(2013·高考重庆卷)When I was little，my mother used to sit by my bed，________me stories till I fell asleep.

A．having told	B．telling
C．told	D．to tell

By the time I saw the job ________ in the newspaper，it was already too late.

A．advertised	B．to be advertised
C．advertise	D．to advertise

To complete the project as planned, the workers were busy working all day, only ______ a short rest once in a while.

_____ according to the instructions, the robot can behave like a human being with average IQ.

A．When to operate	B．When operating
C．When to be operated	D．When operated

The ship ________ a severe storm was travelling to the west coast of the United States from Korea.

Many developed countries have agreed to help the less developed ones but it remains ________ whether they will take action or not.

_______ the TV, Tom began to read newspaper.

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