第1题:
B
The world is not only hungry,it is also thirsty for water. this may seem strange to you,since nearly 75% of the earth is covered with water. But about 97% of this water is sea water.Man can only drink and use the other 3% fresh water that comes from rivers,lakes,under-ground and other places. And we cannot even use all of that,because some of this fresh water has been made dirty.
At the moment,this small amount(数量) of fresh water is still enough for us. However,our need for water is getting greater and greater. Only if we take steps to solve this problem now,we can get away from a serious world water shortage later on. The people of the world cannot have an enjoyable life without enough clean water.
On one hand we should stop wasting this little water of ours,on the other hand we should find ways to reuse it,but this has not been done widely.
Today,in most large cities,water is used only once and it then returns to the sea or runs into underground places.lf we can make it clean again,it can be used once more just as if it were fresh from a spring.
But even if large cities reuse its water,we still would not have enough in the future. Where.could we turn to next for water? To the ocean! How can we do to make use of this great a-mount of sea water? We can take the salt from the water to make it fresh.
So if we take all these steps,we'll be in no danger of drying up!
( )26. Why does the writer say that the world is thirsty for water?
A. The amount of fresh water is really very small.
B. The people of the world waste too much water.
C. The people of the world have to drink a lot of water every day.
D. There are too many people in the world needing water.
第2题:
A、break into
B、break down
C、break up
D、break out
第3题:
A、Leading finding leading
B、to lead found to lead
C、Led finding led
D、Leading found led
第4题:
you had some trouble finding where i live, ______?
A、didn’t you
B、hadn’t you
C、do I
D、don’I
第5题:
第6题:
第7题:
第8题:
If had we had better equipment
Had we had better equipment
Had had we better equipment
We had had better equipment
第9题:
engine
sea water pump
cylinder cooler
fresh water generator
第10题:
where is the trouble
where does the trouble
where the trouble lies
what is the trouble
第11题:
to lead; finding
to lead; to fred
leading; to find
leading; finding
第12题:
Thanks to
Thanks for
For
Under
第13题:
From this selection we may conclude that the king's crown______.
A. moved less water than pure gold of the same size
B. moved more water than pure gold of the same weight
C. moved more water than pure gold of the same size
D. moved less water than pure gold of the same weight
第14题:
Rarely ()the opportunity to inform. our customers of such good news.
A、had we have
B、do we have
C、we will have
D、did we had
第15题:
They had trouble ______ tickets before the holiday.
A、getting
B、to get
C、get
D、got
第16题:
第17题:
第18题:
第19题:
(),we would have finished it then.
第20题:
Evaporation
Circulation
Condensation
Distillation
第21题:
exhaust valves
mechanical lubricators
cooling water pumps
fuel injection pumps
第22题:
had not allowed, would not have
had not allowed, would not have had
didn’t allow, would not have
didn’t allow, would not have had
第23题:
No sooner we started out when
Hardly had we started out that
Scarcely had we started out that
Rarely had we started out when
第24题:
principles
prescriptions
formula
formulae