He kept yawning in class this morning. That is he stayed up late doing his homework last night.A．whyB．howC．becauseD．whether 题目和参考答案——青夏教育精英家教网—

题目内容

He kept yawning in class this morning. That is _____ he stayed up late doing his homework last night.

A．why

B．how

C．because

D．whether

试题分析：句意：今天早晨上课他一直在打哈欠。那是因为他昨晚熬夜到很晚写家庭作业的缘故。通过分析句子结构，可知这个句子中包含一个表语从句，且表示“因为”，这样的意思，所以用because，选C。

练习册系列答案

A．how is he getting along	B．that he gets along well
C．what he is getting along	D．if he is getting along well

—Don't you think it necessary that he ________ to Miami but to New York?
—I agree, but the problem is ________ he has refused to.

A．will not be sent；that

B．not be sent；that

C．should not be sent；what

D．should not send；what

(2013·安徽，21)From space, the earth looks blue.This is ________about seventyone percent of its surface is covered by water.

—We were surprised to hear that the reason_______ she gave for her absence was______ her mother was ill.
—Yes，we saw her mother was at the supermarket that morning.

Courage is a good quality and is ________ it takes to get over difficulties.

—I prefer shutting myself in and listening to music all day on Sundays.
— That’s _________ I don’t agree. You should have a more active life.

Steve Jobs once said: “I’m convinced that the only thing _______ kept me going was _______ I loved what I did.”

What is even more important is______ the earth cooled down, water began to appear on its surface.

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