Choose the correct words and expressions. 1. We... each other since we were in the kindergarten. a. know b. are known c. have known 2. I have ... received a wedding invitation from my half-brother. a. still b. just c. yet 3. ... your parents already ... their tickets for the concert? a. Did/buy b. Have/bought c. Are/buying 4. They haven't prepared well for their family gathering .... a. already b. for c. yet 5. How long ago ... studying at this school? a. did you start b. have you started 6. My sisters ... shy. Actually, they are very sociable. b. looks like c. are you started c. look like a. are 7. My uncle... kind. He always talks to everybody politely. b. is a. are c. looks like​