We can never expect ____ bluer sky unless we create _____ less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
I’ve never seen such an interesting film we saw last night.
| A．when | B．as | C．that | D．which |
The rules that punish the students for their bad actions and habits get the students _________.
| A．to worry | B．worrying | C．worried | D．worry |
I made a promise anyone set me free I would make him rich.
| A．as if | B．that if | C．which when | D．if |
—What do you think about _________ dress in the shop window?
—Oh, it’s beautiful. Linda will be pleased if she can have it as _________ birthday present.
| A．a; a | B．the; a | C．a; the | D．the; the |
I think you should complain —______,of course, you are happy with the way things are.
| A．if | B．unless | C．as | D．because |