现在完成时态巩固练习 1．Many people _______________ (catch) novel coronavirus(新型冠状病毒) in the world so far, so we had baiter not go to the crowds. 2．Her pet dog _______________ (die) for three days and she feels sad about it. 3．No country _______________ (change) a lot as China in the past thirty-five years. 4．My uncle _______________ (live) in Beijing for two years and a half. 5．She_______________（see）the film three times. She knows about it very well. 6．I_______________ (keep) the books for three weeks. 7．The money given by his parents_______________ (run） out already. 8．We_______________ (realize )the importance of low—carbon(低碳)life and will take action right now. 9．My family has_______________ (move) in this city for five years. 10．Since then, we_______________ (help) the homeless people. 11．My e-friend_______________ (not reply) to my e-mail so far. It makes me worry about him very much. 12．Many people has already 　 　the importance of protecting the fresh water.(realize) 13．I hear my neighbor’s dog has already been_______________ (die) for some days. 14．Since then, people _______________ (be) able to speak to each other over long distances. 15．The young man_______________ (take) some medicine, but he's still feeling cold. 16．The number of cars in cities _______________ (become) bigger during the past ten years. 17．He_______________ (not receive) any letters from his family since he left home. 18．The shop_______________ (close) since last year. 19．Mr Green often goes to America. In fact, he _______________ (be) there ten times. 20．She _______________ (write) 5 letters since she 　 　 (come) here. 21．The city is so beautiful now. It _______________ (change) a lot. 22．I_______________ (lose) my key. I can't open the door. What should I do? 23．In recent years, the number of people who have the disease _______________ (decrease). 24．Mike _______________ (become) a worker in the factory in 1998. He _______________ (work) there since then. 25．We _______________ (know) each other since we were in primary school. 1/4 26．Linda has to stand outside, because she _______________ (lose) her key. 27．Miss Lee _______________ (teach) us English since. She came here three years ago. 28．Both of them _______________ (be) in Hong Kong for ten days. 29．The population of the city _______________ (increase) by 2 million in the past ten years. 30．The police _______________ (catch) two members of the gang since the robbery 　 　 (take) place last week. 31．Would you mind_______________ (lend) me your bike? Someone _______________ (steal) mine. 32．The Century Park _______________ (attract) thousands of visitors for several years. 33．I'm waiting for my parents at the bus stop. But neither of them_______________ yet. (arrive) 34．So far, I_______________ (make)quite a few friends here. 35．My brother _______________ (be) born in 1983 Since then, he 　 　 (live)in this city. 36．My teacher _______________ (teach) in this school for ten years. 37．—Where is Mr. Brown? —He _______________ (go) to the library. He will come back in an hour. 38．I _______________ (buy) my computer for almost ten years. It still works OK. 39．So far, not only the clothes shop but also the two shoe shops_______________ (open) for three years. 40．My brother _____________ (join) the army a year ago. He ______________ (be) a soldier for a year. 41．The film_______________ (begin) for five minutes. 42．Daniel_______________ (be) in Hong Kong for two days. 43．—You 　 　 your lost umbrella, haven't you? —Yes, I_______________ it behind the door this morning. (find) 44．—Have you ever _______________ (be) to Guangzhou? —No, but I_______________ (go) there some day. 45．—Where are your parents? —They_______________ (fly) to Tibet for a holiday already. 46．—Mary with her parents_______________ (go) to Hong Kong already. —Really? When will they be back? 47．Things_______________ (change) a lot over the years. 48．Half an hour _______________ (pass) since the train _______________ (leave). 2/4 49．So far, we've _______________ (success) in saving thousands of people in danger. 50．I _______________ (read) this book. It's boring. I don't want to read it again. Keys 1.have caught2.has been dead3.has changed4.has lived5.has seen6.have kept7.has run8.have realized 9.moved10.have helped11.hasn't replied12.realized13.dead14.have been15.has taken16.has become 17.hasn't received18.has been closed19.has been20.has written；came21.has changed22.have lost 23.has decreased24.became；has worked25.have known26