Bad habits, _________ formed, are difficult to get rid of.
| A．and | B．or | C．once | D．but |
Jack couldn’t remember the exact date of the typhoon, but he knew it was _____ Sunday, because everybody was at _____ church.
| A．/; the | B．/; a | C．a; / | D．the; / |
—I can’t get on with some of my classmates. They just leave me in the cold.
—______ But what’s the reason?
| A．Sorry to hear that. | B．How about that? |
| C．Don’t mention it. | D．Never give up. |
I have made ______ clear that all of us are strongly against smoking in the office.
| A．this | B．it | C．that | D．one |
The area ______ the explosion happened was closed off by the police.
| A．which | B．as | C．why | D．where |
She had a bad cold, but luckily began to _______ soon.
| A．recover | B．control | C．lose | D．reduce |