Answer key IV I a a d c d a named after b will enjoy b can’t be c of looking c is discourage expertise does couldn’t unlock was able to V II 10 c b a d c a a c d d 11 d 12 b 13 b 14 d 15 b 16 c 17 b 18 a 19 a 20 b 21 b III have decided isn’t working left belongs be transferred has risen importance sastisfaction exctinct 10 welcoming VI A friend of mine helped me to get a job whose mother is the manager of a company Sarah as well as her brothers plays the violin very well It is the Chemistry that is most worried about by the students Not only did Jane arrive late but she also started complaining She is considered to have been the best singer that America has ever produced Chu Huong Linh Do Dieu Linh