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 |
The __________ teacher thinks it is __________ to devote so much time to his students.
| A．worth; worthwhile |
| B．worthwhile; worthy |
| C．worthy; worth |
| D．worthy; worthwhile |
Although it is __________ to
watch programs on TV sometimes, I think people shouldn't spend most of the time watching it.
| A．worthwhile |
| B．worth of |
| C．worth |
| D．worthy of |
-__________ for you?
-How about next Friday?
| A．When do you think it is convenient |
| B．Do you think when it is convenient |
| C．When do you think is it convenient |
| D．Do you think when is it convenient |
He is one of my students and always come to see me whenever __________.
| A．he is convenient |
| B．he will be convenient |
| C．it is convenient to him |
| D．it will be convenient to him |
I Come and see me whenever __________.
| A．you are convenient |
| B．you will be convenient |
| C．it is convenient to you |
| D．it will be convenient to you |