Choose the word or phrase (A, B, c or D)) that best fĩts the blank space in the following passage:
We are using up the world’s Petroleum. We use (11)_________in our cars and to heat our building in winter.Farmers use petrochemicals to (12)_________the soil rich. They use them to kill insects (13)_________eat plants. These Chemicals go (14)_________rivers and lakes and kill the fish there. Thousands of pollutants also go into the air and pollute it. Winds carry this (15)_________air to other countries and other continents.
Poor farmers use the samc land over and (16)_________. The land needs a rest so it will be better next year. However, the farmers must have food this year. Poor people cut down forests (17) _________ firewood. In some arcas when the trees are gone, the land (18)_________desert. Poor people canh save the environment for the (19)_________.
This is not a problem for one country or one area of the world. It is a problem for all- humans. The people and the nations of the world must work together to (20)_________the world’s resources.
Question 11
A. it
B. them
C. that
D. those
Đáp án là A. it dùng để thay thế cho danh từ số ít đã đề cập trước đó. It = Petroleum