We are all slowly destroying the earth. The seas and rivers are

We are all slowly destroying the earth. The seas and rivers are (19)……… dirty to swim in . There is so much smoke in the air that it is (20)…… to live in many of the world’s cities. In one well- known city, for example,(21)……. gases from cars pollute the air so much that traffic policemen have to (22)………………. Oxy masks.We have cut down (23)…….. many trees that there are now vast areas of (24)…… all over the world . As a (25)… ,farmers in parts of Africa can’t grow enough to eat .In certain countries in Asia, there is too (26)….. rice. Moreover, we do not take enough(27)……… of the countryside. Wild animals are quickly (28)…… .For instance , tigers are rare in India now (29)…. We have killed too many for them to (30)………. However, it isn’t enough simply to talk about the problem. We must act now before it is too late to do anything about it .Join us now .Save the earth .
câu. 1: ______(19)
A. very
B. too
C. much
D. enough
câu. 2: ________(20)
A. unfit
B. inappropriate
C. unlikely
D. unhealthy
câu. 3: ______(21)
A. poisonous
B. serious
C. bad
D. evil
câu. 4: ______(22)
A. take
B. bring
C. wear
D. carry
câu. 5: _______(23)
A. so
B. much
C. too
D. enough
câu. 6: ______(24)
A. ground
B. wasteland
C. fields
D. meadows
câu. 7: ______(25)
A. fact
B. matter
C. problem
D. result
câu. 8: ________(26)
A. little
B. few
C. much
D. fewer
câu. 9: ________(27)
A. attention
B. care
C. time
D. deny
câu. 10: _____(28)
A. escaping
B. hiding
C. running
D. disappearing
câu. 11: _______(29)
A. because
B. when
C. and
D. so
câu. 12: ________(30)
A. die
B. preserve
C. survive
D. continue