A nurse moved to the life support machine and ____ a switch.

In history, which river once has been declared biologically dead, no longer able to support any life?

中国中部地区的生命保障系统问题重重。 A: Heartland China's life-support system is in trouble. B: Heartland China's life-support system has many many problems. C: / D: /

Some scientists think there may have been life on the Mars in the past because （） A: there is no life there now B: there is a large amount of water at the poles C: the Mars may be able to support life in the future D: conditions may have been similar to those on the Earth

Since parents are usually the major source of social support in early life, a child’s ______ of parental love may have effects on their life.

A good marriage for Charlotte is her husband can ___________.（ ） A: financially support her B: offer her a luxurious life C: be an aristocrat in the future D: be very rich in the future

My wife Judith I wish to thank for maintaining the life support systems and providing joy to counter(反击) the gloom(忧郁) and darkness(低落) which periodically descend on most authors.

Since parents are usually the major source of social support in early life, a child's ________ of parental love may have important effects on their life. A: plantation B: perception C: qualification

Paragraph 5（） A: Colorful Life on Campus B: Intelligent Student Body C: Excellent Administration D: Distinguished Faculty E: Substantial Financial Support F: Rich European Flavor

Unless we can find a way to ________ nature and then invest in protecting it, our basic life-support systems are going to collapse.