Choose the word (a, b, c or d) that best fits each of the blank spaces. The (Question 36) ___ oceans are so vast that they can cope (Question 37) ___ the present levels of pollution. However, little is known about the long-term effects of such slow (Question 38) ___. The most serious problem of modern times is (Question 39) ___ man is destroying the earth’s natural resources and transforming huge areas (Question 40)__ wasteland. (Question 41)___ a result, it is becoming extremely difficult to grow enough to feed the world’s rapidly increasing population. A way of protecting all the wildlife on the earth must also be found as many species are (Question 42) ___ danger of disappearing completely from the face of the earth. The dangers, (Question 43) ___, are not confined solely to the land and the sea. The smoke in the atmosphere, for example, is increasing so much that the amount of (Question 44) ___ has been reduced in many cities. Man’s whole (Question 45) ___ is being changed in a serious way. Question 36:
