David came from school one day with a lot of homework to do. He walked angrily into the kitchen and put his books down on the table. His older sister Sarah was listening to music and doing her homework."My teacher wants us to write a paper," he said to Sarah. "I don't know what to write". "well, why don't we go to the library?" Sarah said. She was trying to give him some helpful ideas. "We can find lots of book there." They went to the library and David did a lot of reading about subjects that he was interested in. He finally found something to write about. Then he set down and carefully wrote his paper. Sarah looked over his paper for errors. "This looks like a good paper!" she said. "I bet you' II get an A.