根据短文内容，从短文后的选项中选出适当的选项补全短文。

     The earth is about 4,600 million years old. We humans have lived on the earth for only 35,000 years, but during this period we have changed our planet a lot in many ways.    1  

     All over the world, people have cut down millions of trees, so more and more kinds of animals and plants are disappearing. In big cities, cars and buses have polluted the air. Factories have also polluted the land and the water.

         2   It is important to the earth. But now air pollution is destroying it and that has made a very big hole in the ozone layer (臭氧层).   3  This is very dangerous because it can cause cancer.

     Carbon dioxide (CO₂) in the air has increased a lot.   4  it has formed a "blanket" (毛毯) around the each.    5   This makes our earth become warmer and warmer. Therefore, this causes the level of the ocean to rise.

     All these problems are very serious. We must do something to stop our earth from being polluted anymore.

根据短文内容，从短文后的选项中选出适当的选项补全短文。
The earth is about 4,600 million years old. We humans have lived on the earth for only 35,000 years, but during this period we have changed our planet a lot in many ways.    1  
All over the world, people have cut down millions of trees, so more and more kinds of animals and plants are disappearing. In big cities, cars and buses have polluted the air. Factories have also polluted the land and the water.
  2  It is important to the earth. But now air pollution is destroying it and that has made a very big hole in the ozone layer (臭氧层).   3 This is very dangerous because it can cause cancer.
Carbon dioxide (CO₂) in the air has increased a lot.   4 it has formed a "blanket" (毛毯) around the each.    5  This makes our earth become warmer and warmer. Therefore, this causes the level of the ocean to rise.
All these problems are very serious. We must do something to stop our earth from being polluted anymore.

When people talk about air pollution, they are usually thinking about outdoor air  1 . But do you know that there is    2  air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses have   3   to do with polluted indoor air.
A lot of pollution comes from indoor activities   4   smoking and cooking. As most people    5   about 80-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.
Air pollution influences our health   6 . When the air is polluted, not only young children and old people suffer from it,   7  people with health problems suffer as well. Indoor air pollution can   8  people's eyes, noses and throats. Air pollution, both indoor and outdoor, can also lead to lung cancer（肺癌）and heart disease! In the great London fog in 1952, 4,000 people died in a few days   9  the pollution!   10  is said that half a million young children and women die each year in India because of indoor air pollution!

When people talk about air pollution, they are usually thinking about outdoor air  1 . But do you know that there is    2  air pollution inside homes, offices, hotels and other buildings? The air in your home can be 2 to 100 times more polluted than the air outdoors! In fact, some American doctors say that 50% of illnesses have   3   to do with polluted indoor air.

A lot of pollution comes from indoor activities   4   smoking and cooking. As most people    5   about 80-90% of their time inside buildings, it is important to take indoor air pollution seriously, too.

Air pollution influences our health   6 . When the air is polluted, not only young children and old people suffer from it,   7  people with health problems suffer as well. Indoor air pollution can   8  people's eyes, noses and throats. Air pollution, both indoor and outdoor, can also lead to lung cancer（肺癌）and heart disease! In the great London fog in 1952, 4,000 people died in a few days   9  the pollution!   10  is said that half a million young children and women die each year in India because of indoor air pollution!

1.                A．pollution        B．sadness         C．illness    D．business

2.                A．too            B．none           C．also  D．neither

3.                A．nothing         B．everything      C．something     D．anything

4.                A．as well as       B．such as         C．instead of D．for example

5.                A．take           B．cost            C．give D．spend

6.                A．in many ways    B．in many things    C．in many houses     D．by the way

7.                A．and            B．but            C．or   D．until

8.                A．hit            B．hurt           C．polluted  D．destroyed

9.                A．because of      B．thanks to        C．related to     D．or

10.               A．This           B．That           C．What D．It

Jim wants to be a great painter. Sometimes he draws a horse in many ways ________he is ready to paint.

A. until          B. so             C. after         D. before