1 . 听下面一段对话，回答以下小题。
1. How does the woman look now?

A．Tired.

B．Upset.

C．Excited.

2. What does the woman think of Linda?

A．Intelligent and pretty.

B．Popular and lovely.

C．Hard-working and smart.

3. What’s the weather probably like now?

A．Cloudy.

B．Sunny.

C．Rainy.

4. What will the man probably do next?

A．Borrow some books.

B．Study with the woman.

C．Return to the teaching building.

2 . 听下面一段较长对话，回答以下小题。
1. What did the woman enjoy doing during the flight?

A．Sleeping.

B．Watching films.

C．Seeing the views outside.

2. How was the weather when the speakers arrived in South Africa?

A．Rainy.

B．Sunny.

C．Windy.

3. What animals did the man like best?

A．Elephants.

B．Lions.

C．Monkeys.

4. What did the speakers do on Sunday?

A．They went boating.

B．They went swimming.

C．They walked in the desert.

3 . 听下面一段较长对话，回答以下小题。
1. How was the weather yesterday?

A．Sunny.

B．Cold.

C．Rainy

2. What does the woman think of Henry?

A．Patient.

B．Clever.

C．Nervous.

3. How long did the woman ski?

A．For half an hour.

B．For an hour

C．For an hour and a half.

4. Where does the man come from?

A．The east.

B．The north.

C．The south.

4 . 听下面一段独白，回答以下小题。
1. What was the weather like before the storm?

A．It rained for weeks.

B．It was warm for two days.

C．It didn’t rain much for months.

2. Which part of the city has more hills?

A．West

B．South.

C．North.

3. Why should people stay away from the Creek Canyon?

A．Chemicals will be used there.

B．The road is washed out.

C．The ground is too hard.

4. Who should go to the flood relief clinic?

A．Babies.

B．The elderly.

C．Those injured in the floodwater.

5 . Weather reports often mention high or low pressure systems headed toward a city or town. If you’re in the path of one of these systems, expect a change in weather conditions. High and low pressure systems operate using similar principles, but the effects they produce differ significantly.

View a weather map, and you may see distinct regions that represent different air masses. An air mass is a region of air that has about the same humidity(湿度) and temperature throughout. When an air mass remains over a location for a while, it decides the characteristics of the region. Air masses can be cold or warm and they may contain wet or dry air. All air masses have the ability to move away from their source region into other locations.

Meteorologists(气象学家) call the boundary between two air masses a front. A cold front’s motion through a warm front is a low-pressure system. If a cold air mass replaces a warm air mass, you have a cold front. Air in the cold air mass is often drier than air in front of it. As the air masses meet, the wind usually changes direction and rain or thunderstorms often occur.

A warm front is associated with a high-pressure system and occurs when a warm air mass replaces a colder air mass. A high-pressure system often brings clear, calm weather. Warm fronts travel slowly and are weaker than cold fronts.

Cold fronts move faster than warm fronts because a cold front contains denser air. Cold fronts also often travel from west to east while warm fronts move from north to south. As a warm front approaches, temperatures may rise as warmer air flows in from a warm air mass. However, when the cold front hits, temperatures can drop precipitously within a short time.

1. How is the temperature of a region under a certain air mass?

A．Unusual.

B．Stable.

C．Diverse.

D．Changeable.

2. What happens when two air masses meet?

A．A clear sky appears.	B．A strong wind is formed.
C．The air becomes wetter.	D．The wind changes directions.

3. What does the underlined word “precipitously” in the last paragraph mean?

A．Sharply.

B．Slowly.

C．Possibly.

D．Specially.

4. What is mainly talked about in this text?

A．The formation of air masses.	B．The new findings of meteorologists.
C．The effects of air mass and fronts on weather.	D．The methods for accurate weather forecasts.