根据对话内容,在空白处填写适当的话语。

   Dora: Do Chinese keep animals for pets?

Li Dan: Not as __1__ as people in the USA.

  Dora: What animals do they usually keep?

Li Dan: They usually keep dogs, cats, birds, fish and so on.

  Dora: __2__ do you keep?

Li Dan: I don't keep any animals as a pet.

  Dora: __3__?

Li Dan: To keep a pet takes time and costs money.

  Dora: Yes, that's true. If you keep a pet, you need to spend some time __4__ it, like

            walking it, feeding it and cleaning it. When it gets sick,  you need to send it to hospital.

Li Dan: I don't keep pets because I think pets often make our rooms dirty and smelly.  If I keep a

            pet,  I prefer to keep fish because they are clean.

 Dora: __5__.