第二部分 英语知识运用(共两节,满分45分)第一节 单选填空(共15 小题,每小题1分,满分15分)从a、b、c、d、四个选项中,选出可以填入空白处的最佳选项,并在答题卡上将该选项涂黑。(原创或改编) 21. — thank you very much for helping me when i was in trouble. — _____. a. don't mention it b. with pleasure c. that's right d. you said it 22. it is acknowledged that ___ shortest distance between persons is ___ sincere smile.. a. a; the b. the; / c. a ; / d. the ; a 23. he hasn’t got any hobbies---_______ you call watching tv a hobby. a. if b. unless c. when d. since