They multiplied and filled the oceans and seas with oxygen, _____ encouraged the later development of early shellfish and all sorts of fish.
| A．that | B．where | C．when | D．which |
I have difficulty in learning English, but I don’t know whom to ________.
| A．turn to | B．look for |
| C．deal with | D．talk about |
Only when he apologizes for his rudeness _____ to him again.
| A．I will speak | B．will I speak |
| C．do I speak | D．I speak |
He _____ the conversation and answered the phone, leaving us alone.
| A．broke off | B．broke up |
| C．broke in | D．broke down |
We were glad to know that all the workers who _____ in the mine were saved.
| A．trapped | B．were trapping |
| C．had trapped | D．had been trapped |
Linda went to a party with a girl, _____ favorite hobby is collecting stamps.
| A．who | B．whom | C．whose | D．which |