B">B .All our food comes from animals.

C. Most of our food comes from the soil.

D.None of our food comes from the soil.

( )47. What does the writer tell us in the first paragraph (段落)?

A.There would be no animals without meat.

B">B.There would be no plants without animals.

C.Leaves, plants, grass and waste live on each other.

D.People, animals, plants and soil live on each other.

( )48. Which is the best food for soil in the field?

A. Chemical fertilizers.B">B. Animals waste.

C.. Plants and grassD. Different crops.

( )49. Why do we often grow a different crop in the same place every year?

A.Because">Because we do this as a habit(习惯).

B">B.Because">Because we dont have enough land.

C.Because">Because w can keep the soil rich this way

D.Because">Because we want to have a different food.

( )50. What is the best title for the passage?

A. Soil and Waste B">B. Plants and Animals

C. Food and WasteD. Soil and Food

B

Sowells

Summer

Sale!

Final reductions on a large range of ladies, mens and childrens fashions, plus furniture.

9:30a.m.---6:00p.m.

Mon.---Wed.

9:30a.m.---8:00p.m.

Thurs.

9:30a.m.---7:00p.m.

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