He offered to _____ her a hand as the suitcase was too heavy for her to carry.
| A．lend | B．help | C．show | D．loan |
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 |
The police are offering a(n) ______ for anyone who can give information about the trafficaccident.
| A．attention | B．prize | C．reward | D．gift |