We can never expect ________bluer sky unless we create _____less polluted world
| A．a;a | B．a ;the | C． the ;a | D．the; the |
If you don’t pay your electricity bill, it will be _______.
| A．cut off | B．cut up | C．cut down | D．cut in |
---We’d like a double room with a view , please.
---I’m sorry, but all double rooms with a sea view _____________already.
| A．were reserved | B．had been reserved |
| C．have been reserved | D．have reserved |
---Fish need water to survive; _____ , we human beings rely on air to live.
| A．particularly | B．obviously | C．actually | D．similarly |
____time goes by, Mother’s hair is turning gray and the wrinkles on her face deeper.
| A．with | B．as | C．while | D．when |
Nowadays, there is a ____ that receiving education is a waste of time.
| A．mind | B．concept | C．custom | D．belief |