根据上下文及所给词的首字母补全对话。（每空一词，每小题1分，共5分）
A: Hey, Alice! My parents b        me a dog in the pet shop.
B:   S           great!
A: It’s so c        and clever that I can’t help kissing it and allowing it to sleep in my bed.
B: Oh, you’d better not do like that.
A: Why?
B: Because pets can carry many viruses（病毒）which lead t       dangerous diseases.
A: Oh, my God! What should I do then?
B: Don’t worry.If you always give it a a      and keep it clean.It’ll be OK.