Mary was much kinder to Jack than she was to others, ______, of course, made all the others upset.
| A．who |
| B．which |
| C．what |
| D．that |
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 |
.This is Mr. White , ____ I think has something interesting to tell you .
| A．which | B．whom | C．that | D．who |
---- Will Thursday or Friday ____ you ? ---- Either will _____ .
| A．fit ; be | B．fit ; OK | C．suit ; all right | D．suit ; do |
This will not only keep the study habit ____ but also keep you up to date on your class assignments .
| A．alive | B．living | C．vivid | D．lively |