【C7】A．farmlandB．mountainC．wetlandsD．forest

【C6】

A．inland

B．suburban

C．urban

D．coastal

【C4】

A．resulting from

B．leading by

C．resulting in

D．leading with

he globe living at sea level. Nearly one-third of all human beings live within 36 miles of a coastline. Most of the worlds great seaport cities would be【C1】______. Some countries would be inundated. Heavily populated coastal areas【C2】______large populations occupy low-lying areas, would suffer extreme【C3】______. Warmer oceans would spawn stronger hurricanes and typhoons,【C4】______coastal flooding, possibly swamp ing valuable agricultural lands around the world.【C5】______water quality may result as【C6】______flooding forces salt water into coastal irrigation and drinking water supplies, and irreplaceable, natural【C7】______could be flooded with ocean water, destroying forever many of the【C8】______plant and animal species living there. Food supplies and forests would be【C9】______affected. Changes in rainfall patterns would disrupt agriculture. Warmer temperatures would【C10】______grain-growing regions polewards. The warming would also increase and change the pest plants, such as weeds, and the insects【C11】______the crops. Human health would also be affected. Warming could【C12】______tropical climate bringing with it yellow fever and other diseases. The harmful【C13】______of localized urban air pollution would very likely be more serious in warmer【C14】______. There will be some【C15】______from warming. New sea-lanes will open in the Arctic, longer growing seasons further north will【C16】______new agricultural lands, and warmer temperature will make some of todays colder regions more【C17】______. But these benefits will be in individual areas. The natural systems—both plant and animal—will be less able than man to cope and【C18】______. Any change of temperature, rainfall, and sea level of the magnitude now【C19】______will be destructive to natural systems and living things and【C20】______to man as well.

【C1】

A．ascended

B．assaulted

C．erased

D．endangered

【C20】

A．unique

B．mysterious

C．rare

D．perfect

【C19】

A．variety

B．mixture

C．preparation

D．coordination

【C18】

A．adequately

B．massively

C．plentifully

D．largely

【C17】

A．special

B．automatic

C．similar

D．expensive

【C16】

A．suppliers

B．plants

C．chains

D．critics

【C15】

A．possesses

B．buys

C．acquires

D．grows

【C14】

A．result in

B．refer to

C．focus on

D．stem from