31. The train ______ half an hour ago. A. has been leaving​B. left​C. has left​D. had left 32.The number of competitors who take part in the Olympic Games increases every year. A. participate in ​B. happen ​C. take place​ D. accept 33. Jim_______ to his girlfriend on the phone when I_______ in. A. talked / came​ ​B. talked / was coming ​ C. was talking / was coming ​D. was talking / came 34. Mary is a humorous girl. She always makes me……….. A. laughed ​B. to laugh ​C. laughing ​ D. Laugh 35.Christopher Columbus _________ American more than 500 years ago. A. discovered​B. has discovered​ C. had discovered​ D. had been discovering 36.If you only care about your interests and feelings, you are very ---------------------. A loyal​B friendly​C selfish​D happy​ 37.Each nation has many people who__________ take care of others. A. volunteered​B.voluntarily​C. volunteers​D. voluntary 38.Teenagers nowadays often have their own __________ who they really love and imitate in different ways. A. idol​B.singer​C.person​D.crush​ 39. The wedding party _______ held at the Rex Hotel now. A. is​B. is being​C. will be​D. is going to be 40.The doctor advised _______ late. A. me not staying up ​B. me not stay up C. me not to stay up D. I did not stay up 41.Where is Mary? – She _________ for the dinner in the kitchen at the present. ​A. prepares​B. prepared​C. is preparing​D. has prepared 42. Since _______, I have heard nothing from him. A. he had left ​B. he left​C. he has left​D. he was left III. Put the words in the correct Tenses:(1đ) 1.After he (have)…………………….breakfast, he went to work yesterday. 2. Don’t waste her time …………………….(complain) about her salary. 3. My car needs (repair)………………………………. 4.I saw the thief (steal) ………………………..the bycicle.