It was not until the 18th century that man realized that the whole of the brain was involved in the working of the mind， ？
| A．was it | B．wasn’t it | C．did they | D．didn’t they |
It’s been discovered in the study ______ people are more relieved after forgiving others.
| A．that |
| B．what |
| C．which |
| D．whose |
______ Stephon Marbury is an American, he has become a role model among Beijing basketball fans.
| A．As |
| B．Although |
| C．When |
| D．Since |
--- You look great!
--- I ______ out. Check out my muscles!
| A．will work |
| B．was working |
| C．have been working |
| D．had been working |
hand in your homework right now?
| A．Oughtn't to you |
| B．Oughtn't you to |
| C．Ought you not to |
| D．Ought you to not |
I been there then, I would have helped you.
| A．Having |
| B．Has |
| C．Have |
| D．Had |