完形填空。 A: 1 is this bag at the door? Is it 2 , Mr Read? B: No. His bag is 3 , but this one is green. I think 4 Mr Black's. A: Excuse me. Mr Black. Is this 5 yours? C: Oh, yes, it's 6 bag. A: It's so heavy (重的). 7 in it? C: There are 8 T-shits in it. A: T-shirt? 9 colour are they? C: 10 many kinds of colours. (     )1.A. Whose (     )2.A. you (     )3.A. big (     )4.A. it (     )5.A. book (     )6.A. my (     )7.A. What (     )8.A. a (     )9.A. What (     )10.A. It's B. Who's B. your B. green B. its B. bag B. your B. What's B. some B. What's B. It has C. Who C. brother's C. black C. it's C. light C. me C. It's C. any C. How many C. How D. Whose' D. your brother's D. small D. is D. room D. his D. Where is D. isn't D. How D. There are