.
On average, there are 800 tornadoes in the U.S. each year, _______ about 80 deaths and 1,500 injuries.
| A．cause | B．caused | C．to cause | D．causing |
_________ your help, we completed the work in time.
| A．Under | B．With | C．Because | D．As a result |
After that we never saw her again, nor________ from her.
| A．did we hear | B．we heard | C．had we heard | D．we have heard |
The Education Department announced that all the children should ______ sports meeting .
| A．join | B．join in | C．take part | D．Attend |
Tom’s mother was _________ angry at the news that she could hardly say a word.
| A．very | B．too | C．such | D．So |
二、单项选择（本题共有10小题, 每题1分，共10分）
In ______ fact, I don’t understand what the engineer means, but I have got_______ rough idea of his plan.
| A．＼, a | B．a, the | C．a, ＼ | D．＼, the |