________you like the portable personal computer so much，why not buy one?
| A．So that | B．Now that |
| C．Even if | D．In case |
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 |