| to call on sb/sth | to demand |
| to call sth off | to cancel |
| to call sth/sb up | to show data on a pc screen, to order to join the army or football team ;] |
| to carry on with sth | to continue |
| to carry out sth | to conduct research |
| to carry sth off | to succeed in sth, to complete sth well |
| to carry sth through | to complete sth despite difficulties |
| to catch on | to gain popularity |
| to catch up with sth/sb to come across sth | to find |
| to come by sth | to acquire |