Trees are useful to man in three important ways:they supply him with wood and other products; they gave him shade, and they help to prevent drought and floods.
Unfortunately, in many parts of the world, man has not realized that the third of these services is the most important.Eager to make money from trees, he has cut them down in large numbers, only to find that without them he had lost the best friends of his.And besides, he is usually too careless to plant and look after new trees, so the forests slowly disappear.
This does not only mean that man will have fewer trees.The results are even more serious:for where there are trees, their roots break up soil, allowing the rain to sink in; and also bind(固定)the soil, thus preventing from being washed away; but where there are no trees, the rain falls on hard ground and flows away, causing floods and carrying away the rich topsoil.With the top-soil gone, nothing remains but worthless desert.
(1)
In many parts of the world, forests slowly disappear because ________.
[ ]
A.
many trees have been cut down
B.
man has not paid enough attention to planting trees
C.
new trees are not properly looked after
D.
all the above
(2)
Land becomes desert after all trees are cut down because
[ ]
A.
tree roots break up the soil
B.
there is too much rain falling on the ground
C.
strong winds bring a lot of sand
D.
there are no trees to keep the rain and protect the soil
(3)
The word“he”in the second paragraph refers to ________.
Our boat floated on, between walls of forest too thick to allow us a view of the land we were passing through, though we knew from the map that our river must from time to time be passing through chains of hills which crossed the jungle plains.Nowhere did we find a place where we could have landed:where the jungle did not actually spread right down into the river, banks of soft mud prevented us going ashore.In any case, what would we have sailed by landing?The country was full of snakes and other dangerous creatures, and the jungle was so thick that one would be able to advance only slowly, cutting one’s way with knives the whole way.So we stayed in the boat, hoping we reached the sea, a friendly fisherman would pick us up and take us to civilization.
We lived on fish, caught with home-made net of string(we had no hooks), and fruits and nuts we could pick up out of the water.As we had no fire, we had to eat everything, including the fish, raw I had never tasted raw fish before, and I must say I did not much enjoy the experience; perhaps sea fish which do not live in the mud are less tasteless.After eating my raw fish, I lay back and dreamed of such things as fried chicken and rice, and ice-cream.In the never-ending damp heat of the jungle, ice-cream was a particularly frequent dream.
As for water, there was a choice:we could drink the muddy river water, or die of thirst.We drank the water.Men who had just escaped what had appeared to be certain death lose all worries about such small things as diseases caused by dirty water.In fact, none of us suffered from any illness as a result.
One day we passed another village, but fortunately nobody saw us.We did not wish to risk being taken prisoners a second time:we might not be so lucky to escape in a stolen boat again.
(1)
What they could see in the boat was only ________.
[ ]
A.
high wall
B.
villagers from time to time
C.
vast land
D.
heavy woods
(2)
They couldn’t land because ________.
[ ]
A.
the mud on the shore was too soft
B.
the forest was too thick to let them go through
C.
they could not find the mark on the map
D.
they could not find anyone to lead them out of the forest
(3)
The passage infers that the forest was ________.
[ ]
A.
rich of fruits and animals to be served as food
B.
not very thick as they could advance slowly by cutting the branches
C.
full of various dangerous beings
D.
full of ancient trees
(4)
The most proper title for this passage might be ________.
[ ]
A.
Escape
B.
Scenes of a River
C.
How to Survive on a boat
D.
A New Experience
阅读理解:
Our boat floated on, between walls of forest too thick to allow us a view of the land we were passing through, though we knew from the map that our river must from time to time be passing through chains of hills which crossed the jungle plains.Nowhere did we find a place where we could have landed:where the jungle did not actually spread right down into the river, banks of soft mud prevented us going ashore.In any case, what would we have sailed by landing?The country was full of snakes and other dangerous creatures, and the jungle was so thick that one would be able to advance only slowly, cutting one’s way with knives the whole way.So we stayed in the boat, hoping we reached the sea, a friendly fisherman would pick us up and take us to civilization.
We lived on fish, caught with home-made net of string(we had no hooks), and fruits and nuts we could pick up out of the water.As we had no fire, we had to eat everything, including the fish, raw I had never tasted raw fish before, and I must say I did not much enjoy the experience; perhaps sea fish which do not live in the mud are less tasteless.After eating my raw fish, I lay back and dreamed of such things as fried chicken and rice, and ice-cream.In the never-ending damp heat of the jungle, ice-cream was a particularly frequent dream.
As for water, there was a choice:we could drink the muddy river water, or die of thirst.We drank the water.Men who had just escaped what had appeared to be certain death lose all worries about such small things as diseases caused by dirty water.In fact, none of us suffered from any illness as a result.
One day we passed another village, but fortunately nobody saw us.We did not wish to risk being taken prisoners a second time:we might not be so lucky to escape in a stolen boat again.
(1)
What they could see in the boat was only ________.
[ ]
A.
high wall
B.
villagers from time to time
C.
vast land
D.
heavy woods
(2)
They couldn’t land because ________.
[ ]
A.
the mud on the shore was too soft
B.
the forest was too thick to let them go through
C.
they could not find the mark on the map
D.
they could not find anyone to lead them out of the forest.
(3)
The passage infers that the forest was ________.
[ ]
A.
rich of fruits and animals to be served as food
B.
not very thick as they could advance slowly by cutting the branches
C.
full of various dangerous beings
D.
full of ancient trees
(4)
The most proper title for this passage might be ________.