| 1 | come over |
| 2 | come straight to |
| 3 | come to one's mind |
| 4 | come undone |
| 5 | come up |
| 6 | come up with |
| 7 | come what may |
| 8 | complain about |
| 9 | computer division |
| 10 | computer programming language |
| 11 | concentrate on sth./ doing sth. |
| 1 | conference center |
| 2 | construction crew |
| 3 | contact lenses |
| 4 | cook out |
| 5 | cool off |
| 6 | cool off |
| 7 | copying machine |
| 8 | cost a fortune |
| 9 | cost sb. an arm and a leg |
| 10 | cough medicine |
| 11 | couldn't make heads or tails of sth. |
| 12 | count on |
| 1 | count sb in |
| 2 | count sb out |
| 3 | course sheet |
| 4 | cram for |
| 5 | criminal law |
| 6 | cross out |
| 7 | curly hair |
| 8 | curriculum committee |
| 9 | customer service |
| 10 | cut down on |
| 11 | cut down the number of |
| 12 | cut off |