It’s impossible for all the people to get jobs because ________of them are not fit for them.
As time went by , the theory he had stuck ______ correct .
Studies show that MP3 people have made much use of _____ music may be causing hearing loss.
When the winter _____ , all the construction works in northern China have to be stopped .
If the balance of nature is ____ , a series of problems will arise .
.This is Mr. White , ____ I think has something interesting to tell you .