— So much work needs to be finished in such a short time.
— _________ I’ll give you a hand.
| A．Not to worry. | B．So what? |
| C．You can’t be too careful! | D．That’s right. |
The old man was found on the floor .
| A．lying；dead | B．lying；death |
| C．lying；died | D．laying；dead |
Scientists are convinced ________ the positive effect of laughter _______ physical and mental health.
| A．of; at | B．by; in | C．of; on | D．on; at |
Each of the students，working hard at his or her lessons，to go to university.
| A．hope | B．hopes | C．hoping | D．hoped |
He has devoted all his life ______ the homeless children.
| A．to helping | B．helping | C．to help | D．help |
In the end, Japan and Korea reached the point ___ both sides sat down and had a peaceful talk.
| A．where | B．that | C．when | D．which |