CHOOSE THE UNDERLINED PART THAT NEEDS CORRECTION.MY BIKE, WHOM I LEFT...

Câu 11: Choose the underlined part that needs correction.My bike, whom I left at the gate, had disappearedA. whom B. my bike C. left D. had disappearedRead the following passage and choose the correct answer (A or B, C, D) to each of the questionsfrom 12 to 16: We are all slowly destroying the earth. The seas and rivers are too dirty to swim in. There is so muchsmoke in the air that it is unhealthy to live in many of the world's cities. In one well-known city, forexample, poisonous gases from cars pollute the air so much that traffic policemen have to wear oxygenmasks.We have cut- down so many trees that there are now vast areas of wasteland all over the world. As aresult, farmers in parts of Africa cannot grow enough to eat. In certain countries in Asia there is too littlerice. Moreover, we do not take enough care of the countryside. Wild animals are quickly disappearing.For instant, tigers are rare in India now because we have killed too many for them to survive. However, itisn't enough simply to talk about the problem. We must act now before it is too late to do anything aboutit. Join us now. Save the Earth. This is too important to ignore.