Nobody really knows the reason why we sleep.A．YB．NC．NG

A.estimate

B.range

C.balance

D.factor

A. know

B. knows

C. to know

D. are going to know

Nobody knows the date of arrival, ______？ ()

A．doesn't he

B．does he

C．don't you

D．do they

wer.

M: Thank you. As you can see, little by little, Americans are turning to solar power, tapping the strength of the sun for energy.

W: Yeah, that's true. Sunlight has already been used for heating or cooling homes and office buildings in the sunny south.

M: Experts say all signs point to the birth of the solar energy industry. Right now, an increasing number of companies are selling solar collector panels to heat and cool homes or to heat water. The glass and metal panels each cost from ＄100 to more than ＄500, and the three or four-bedroom home usually requires a dozen or more. They look like sandwiches. They are usually placed in rooftops. Nobody knows how many have been sold, and in addition, many people have built their own units. It has been estimated that solar power equipment will be a $1.3 billion industry by 1995, and more than a million homes will use sunlight for heat, air conditioning or to generate electricity, both in the cities and in countryside.

W: Wow! That is really big business.

What do we learn about the use of solar energy in the U. S. ？

A．It is very well established.

B．It is relatively new.

C．It is found in one million homes.

D．It is being rapidly expanded.

Nobody can live around the new lake because ______.

A．bottom seepage from the new lake is great

B．one major food source has declined

C．nobody knows for sure where the shoreline will be

D．there is the spread of blood flukes in the area

apons and the discovery of fire, although nobody knows exactly when he acquired the use of the______.

A．latter

B．latest

C．later

D．last

A.really knew

B.is really knowing

C.really knows

D.has really known

Which of the following statements is not true？

A．No one really knows the origin of the theatre.

B．Ritual is no longer represented dramatically.

C．Storytelling is an important part of drama.

D．There are similarities between ritual and drama.

The passage supports which of the following statements？

A．No one really knows how the theater began.

B．Myths are no longer represented dramatically.

C．Storytelling is an important part of dance.

D．Dramatic activities require the use of costumes.

n of three more nuclear power stations. These will form. a vital part of the government's energy plans for the next two decades and are needed to satisfy the country's growing demands for electricity. The plans were strongly criticised by opposition MP's as well as anti-nuclear and environmentalist groups.

W: They must be absolutely mad, more nuclear power stations!

M: OK. Jane. But we've got to get the energy from somewhere, haven't we？ We can't just go on using oil and coal.

W: Look. The main point is they're just net safe. They're a real menace, everyone of these things is an accident waiting to happen. Look at Chernobyl, for goodness' sake!

M: Yes, OK, I agree there's a risk. Of course there is. But it's minimal. With modern technology, nuclear reactors are much safer:

W: Much safer! You must be joking. No. Look at all that radioactive waste they're dumping into the sea and underground. Nobody re ally knows what'll happen long-terms.

M: That is a problem. Sure. But it's also true that nuclear energy is cheap and can produce electricity very quickly. Lots of countries have no alternatives. They don't have any oil, coal or anything. What are they supposed to do？

W: Oh, come on! There're lots of possibilities. Well, quite a few. We just haven't really looked at them seriously enough. There's solar energy, and wind power and, what's called wave power. We've still got a lot of coal.

W: Alright. But they'll all take time and money to develop. We need energy now and nuclear power is the best alternative.

M: Oh, I don't believe this. I reckon it's just crazy.

(20)

A．The Defence Minister.

B．The Energy Minister.

C．The Prime Minister.

D．The Science Minister.