阅读短文，根据短文内容及首字母提示，在空白处填入一个适当的单词。Do you like animals? Do you want to keep animals? Yes, man

阅读短文，根据短文内容及首字母提示，在空白处填入一个适当的单词。
Do you like animals? Do you want to keep animals? Yes, many people like animals and want to keep a lovely animal as a ppet pet . It's a pity that they don't have a suitable place to keep them. However, keeping fish may be the best choice.
Why keep them?
People keep dogs and cats because they enjoy their friendship. Fish can not be friendly, but they have beautiful shapes and colors. It's a pleasure to watch as they swim iin in  their tank（水槽）。
What do they need?
First of all, the fish need a suitable （合适的） tank, and you must fill the tank wwith   suitable water. It is also good for tthem with  to have a few water plants in the tank to keep the water pure （纯净）。 Putting a few snails （蜗牛） in the tank is a good iidea them . They will keep it cclean idea 
What about feeding them?
There are many kinds of fish food tthat clean  you can get in the shops. Most are suitable for all kinds of fish. You should feed your fish only oonce that  a day. It is important not to give them  ttoo once  much food. Just give them as much as they can eeat too  up in about 15 minutes. This will keep them healthy.