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 |
C
解析试题分析：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。
考点：考查表语从句
天天向上一本好卷系列答案
小学生10分钟应用题系列答案The president did much for world peace. That was ______ he was awarded the Nobel Peace Prize.
| A．when | B．what | C．because | D．why |
The research also raises the question ________ children from low-income, less educated families need earlier aid.
| A．what | B．that | C．when | D．whether |
He seems too tired today, and I wonder__________ he got a good sleep last night.
| A．when | B．that | C．if | D．where |
It was__ he said__ disappointed me.
| A．that；what | B．what；that | C．what；what | D．that；that |
—Why didn’t you tell him about the meeting?
—He rushed out of the room _____ I could say a word.
| A．before | B．until | C．when | D．after |
When the audience heard the alarm, they all hurried to they thought was an emergency exit door.
| A．what | B．which | C．where | D．who |
Scientists study ____ human brains work to make computers.
| A．when | B．how | C．that | D．whether |