学进去

When I was nine years old, I wanted to keep a pet fish. After months of _______, I finally had enough money to get one. I named it Bob, I put _______ beautiful toy house with windows in the tank (鱼缸) so that Bob could swim through. Sometimes, I would draw pictures of _______ fish and sea plants and tape them to the side of the tank, so Bob wouldn’t get lonely while I _______ at school.

However, _______ a month, I noticed that the tank was getting dirty. My dad asked me _______ it into the kitchen. He wanted to make sure I knew _______ to do so that Bob wouldn’t get hurt.

First, my dad told me to reach _______ into the tank and take the house away. _______ I took my hand out of the water, I noticed that the water was a lot ________ than I thought.

“ That’s smelly! ” I said. “ Let’s hurry up and ________ the fish out of the water, Dad! ”

“ Not so fast, Ben, ” Dad said. “ We need to save some of the old water, ________ Bob needs a place to stay while we clean the tank. ”

“ Why? ” I asked.

“ Running water from the tap can be harmful to fish, ” Dad explained. “ That ________ we can’t put Bob into fresh water right away. Instead, we need to put him in a cup with ________ of the dirty water for a while. ” …

All seemed so easy. I hoped the next time I would be able to clean the tank all by ________.