[单项选择]The most serious potential natural disasters in New Zealand are ______.
A. storms and earthquakes.
B. volcanoes and floods.
C. earthquakes and volcanoes.
D. floods and storms.

[单项选择]Though we ______ serious natural disasters, we are sure to overcome all difficulties.
A. undergo from
B. suffer from
C. experience with
D. put up with

[单项选择]The phrase "sour the pleasures of society" most nearly means ______.

[单项选择]The most serious problem of large centralized correctional institutions is that ______.
A. they make no distinction between adult offenders and juvenile offenders
B. they make more delinquent youths lose hope for their future
C. their efforts to rehabilitate delinquent youths are completely in vain
D. they provide chances for delinquent youths to be more knowledgeable in crime

[单项选择]Air pollution is the most serious kind of pollution because ______.

[单项选择]What's the most serious problem African nations are facing


A. Hunger.
B. Malnutrition.
C. Lack of drinking water.
D. Poor transportation.

[单项选择]What is the most serious problem in the Green Movement
A. They provide only suggestions and ideals but never put them into practice.
B. People need pay more attention to the knowledge of environment preservation.
C. Desperate pollution in many areas is to deprive mankind of a good future.
D. Survival of mankind pivots on their ability to find new resources.

[单项选择]The most serious damage caused by the viruses is that ______.

[单项选择]

Water is one of the most important natural resources in the world.
Everywhere, water use is (61) . Humans already use fifty-four percent of all the (62) water in rivers, lakes and underground. There are some estimates that this (63) will reach seventy percent by 2005.
Fresh water is necessary for life on Earth. People need water for (64) activities and to produce food. Water also is important for energy production and health of Earth’s environmental systems.
The United Nations is organizing a (65) of events to increase concern (66) water issues. UN officials have (67) 2003 the International Year of Fresh Water. A goal of the (68) is to build support for policies to use water more (69) .
Another goal is to get more people to use water in a way (70) will not hurt environment. The world population is more than six-thousand-million people. More than one-thousand-million (71
A. ratio
B. speed
C. pace
D. rate