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语法和词汇知识（共15小题；每小题1分，满分15分） 从每小题的A、B、C、D四个选项中，选出能填入空白处的最佳选项。并 在答题卡上将该选项涂黑。11. ---Li Ping often watches _______ English TV news in her spare time. ---No wonder she has _______ command of English. A. /; a B. an; the C. the; / D. an; a 12. It’s the third time that Li Ming has been to Xi’an , _______? A. isn’t he B. hasn’t he C. isn’t it D. hasn’t it 13. Don’t call me up at this time tomorrow, for I _______ an important test. A. will take B. am taking C. have been taking D. will be taking 14. Sheldon could have defeated Howard in the match, but he _______ too careless at the last minute. A. is B. was C. has been D. had been 15. _______ I went to the South Lake in Hanzhong, I was deeply impressed with its beautiful scenery. A. For the first time B. The first time C. At first D. It was the first time 16. _______ in the computer game, Peter didn’t notice his father approaching. | 
