新概念英语2 Lesson 11 One Good Turn Deserves Another 礼尚往来I. 语法与词汇知识 1. _ I got to the airport, the guests had left. A. whenB. WhileC. SinceD. So 2. While we _, a stranger came in. A. danceB. dancedC. were dancingD. was dancing 3. You have to pay _ the debt at the end of each month. A. forB. backC. toD. in4. She sat on _ same chair the entire afternoon. A. aB. /C. anD. the 5. Students
