Greatly_________ as the leading scientist,he was asked to give lectures in many countries.
| A．respecting | B．respects |
| C．respected | D．to respect |
For a moment nothing happened. Thenall shouting together.
| A．voices had come | B．came voices | C．voices would come | D．did voices come |
Some people fear that ________ air pollution may bring about changes in _______ weather around the world.
| A．/; the | B．the; / | C．an; the | D．the; a |
It was _____ he came back from Africa that year _________ he met the girl he would like to marry.
| A．when; then | B．not; until | C．not until; that | D．only; when |
The way the guests ___ in the hotel influenced their evaluation of the service.
| A．treated | B．were treated | C．would treat | D．would be treated |
A good friend of mine from I was born showed up at my home just before I left for Beijing.
| A．how | B．whom | C．where | D．which |