I lost my way. I wonder ________ I can turn in the dark.
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 .
---- Will Thursday or Friday ____ you ? ---- Either will _____ .