We can never expect _______bluer sky unless we create ______ less polluted world.
| A．a；a | B．a；the | C．the；a | D．the；the |
In ________ Chinese culture, marriage decisions were made by parents for their children.
| A．traditional | B．historic | C．remote | D．origin |
Dictionaries should be put where they will be easily ___________.
| A．get | B．near | C．accessible | D．access |
---Is Bob still performing?
---I’m afraid not. He is said _______ the stage already, as he has become an official.
| A．to have left | B．to leave |
| C．to have been left | D．to be left |
_________ the task on time, he was fired by the boss.
| A．Not completed | B．Not having completed |
| C．Not have completed | D．Not being completed |
–Why, Jack! Someone seems to have called you over there. – Yes? I __________ that.
| A．am not realizing | B．haven’t realized |
| C．didn’t realize | D．don’t realize |