21. As she ________ a letter last night, the lights suddenly ________ out. A. was writing/ went B. wrote/ went C. was writing/ was going D. write

21. As she ________ a letter last night, the lights suddenly ________ out. A. was writing/ went B. wrote/ went C. was writing/ was going D. writes/ went 22. How ________ since we ________ school? A. are you/ left B. will you be/ had left C. have you been/ had left D. have you been … Đọc tiếp