Context communication. 根据提供的情景,选择恰当的句子。 1. 当你想问你的朋友旅行是否愉快时,你: [ ] A. Hello. B. How are you? C. Did you have a good trip? 2. 当你想问别人是否喜欢中国时,你: [ ] A. Would you like China? B. Do you like China? C. How about China? 3. 当你想把你的朋友介绍给你的朋友时,你: [ ] A. It is my friend, Li Lei. B. He is Li Lei. C. This is my friend, Li Lei. 4. 当你想问谁想唱支歌时,你: [ ] A. Who wants to sing a song? B. Do you like a song? C. Do you want to sing a song? 5. 当你想说到吃午饭的时间了,你: [ ] A. It's for lunch. B. Time for lunch. C. It is lunch now.