2017年高考英语全国一卷真题及答案,2017年高考英语常用3500个词汇解析：U

U
　　50.●undertake (undertook, undertaken) v. 承担，从事，负责;
　　undertake the difficult task/responsibility
　　undertake to do He undertook to finish the job by Friday.
　　51. ◎unfair an unfair judge
　　be unfair on/to sb It’s ~ on him to make him pay for everything.
　　He is ~to us, isn’t he ?
　　52. ● unite v. 联合，团结 Carnival became a way to unite different communities.
　　We should unite with all the forces that can be united.
　　53. upon prep. 在… 上面 upon /on+ sth/doing 名词/动名词= as soon as 从句
　　Upon his arrival, I will telephone you.
　　54. ●upset a. 心烦的，苦恼的 Then the friend went away, and the writer was extremely upset.
　　be upset to do sth: She was upset to hear that the holiday had been cancelled.
　　be upset that clause: Her sister was very upset that her family had to move to California.
　　be upset about/over sth: My parents were in a huge argument, and I was really upset about it.
　　55. ●urge vt. 鼓励，激励 urge sb to do/into doing They urged me to eat the strange food.
　　urge that clause(should do) He urged that we should take such steps.
　　56. use n. 利用，用途;v. 利用 make (good/ better/full) use of sth (好好/充分)利用某物
　　sth be in use/ out of use 某物在被使用/ 某物不被使用
　　sth come into use 开始被使用 It is no use doing.干某事没用
　　be/get used to n/doing 习惯干某事 be used to do 被用来干某事
　　57. ◎useless be ~to do / be ~ doing sth
　　He knew it was ~ to protest It’s ~ worrying about it.
　　use n. 1) make use of … 2 )be of great use to sb / be of no use to sb
　　3) It is no use doing sth
　　58. usual a. 通常的 as usual 向往常一样

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