补全对话。
A: (1)_________, Tony? I haven't seen you for a long time.
B: Oh, I've been to Dalian. It's one of the best cities in China.
A: (2)________?
B: Of course. The best thing there was swimming. It's really cool.
A: (3)______?
B: It's a beautiful city! I've never seen such a beautiful beach in my life.
A: (4)_______?
B: Fro only a week. I wish I could stay there and enjoy sunshine forever.
A: Really? You know, I'm a member of Green China. I want to know something
about the environment there. (5)_______?
B: No. nobody littered things. People always keep rubbish in a bag until they can put it in a dustbin.
A: Well, that's great. I'll go there if there is a chance for me.
1. Where have you been?
2. Have you swum in the sea
3. What do you think of Dalian
4. How long have you been in Dalian
5. Does anybody throw things about/ Is there any rubbish on the beach
答案不唯一
预备体的
面可见残存白色充填物，颊侧部分牙体组织缺失，叩（±），无松动。
间牙龈 * * 红肿，探诊易出血，可探及龈下牙石。X线片示：