Not easy as the problem of pollution is____, no one should just stop trying.
| A．to solve | B．to be solve | C．solving | D．being solved |
The sun was shining brightly, _____ everything there _____ more beautiful.
| A．making; look | B．to make; looked | C．and made; looking | D．and making; be looked |
--Peter is very clever and he studies hard as well．
---No ______be always wins first in the examinations.
| A．doubt | B．question | C．wonder | D．problem |
---What can I do for you？---Well，I’m afraid the box is heavy for you，but thank you all the same．
| A．so | B．much | C．very | D．too |
I was advised to arrange for insurance _____ I needed medical treatment.
| A．although | B．incase | C．so that | D．if only |
--_____ of the population of the city _____workers?
--About 60 percent.
| A．What; is | B．What; are | C．How much; is | D．How much; are |