HE WAS DRIVING VERY FAST BECAUSE HE DIDN’T KNOW THE ROAD WAS ICY....

40/ He was driving very fast because he didn’t know the road was icy. A. If he knew the road was icy, he wouldn’t drive so fast. B. If he had known the road was icy, he wouldn’t have driven so fast. C. He wasn’t driving very fast if he would know the road was icy. D. He hadn’t been driving he would have known the road was icy. VI/ Choose the word or phrase among A, B, C or D that best fits the blank space in the following passage: We are all slowly destroying the earth. The sea and rivers are (41) ………dirty to swim in. there is so much smoke in the air that it is unhealthy to live in many of the world’s cities. In one well-known city, for example, poisonous gases from cars pollute the air so much that traffic policemen have to (42) ………. oxygen masks (mặt nạ phòng hơi độc). We have cut- down (43) ………many trees that there are now vast areas of waste forests all over the world. As a (44) ………. , farmers in parts of Africa cannot grow enough to eat. In certain nations in Asia, there is too little rice. Moreover, we do not take enough care of the countryside. Wild animals are quickly (45)……….. For instant, tigers are rare in India now because we have killed too many for them to survive. 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. This is too important to ignore.