—Why didn’t you put your cellphone in your overcoat pocket?
—I _____, but I was afraid it would be stolen.
| A．had put | B．put | C．would have | D．could have |
The young girl became so emotionally ____ with that guy ; he was anything but brilliant .
| A．involved | B．interested | C．addicted | D．attracted |
As time went by , the theory he had stuck ______ correct .
| A．to prove | B．to proving | C．to proved | D．to be proved |
Studies show that MP3 people have made much use of _____ music may be causing hearing loss.
| A．enjoy | B．to enjoy | C．enjoying | D．enjoyed |
When the winter _____ , all the construction works in northern China have to be stopped .
| A．sets off | B．sets out | C．sets aside | D．sets in |
If the balance of nature is ____ , a series of problems will arise .
| A．disturbed | B．troubled | C．interrupted | D．confused |