Read the following paragraph and underline the topic sentences.
Video cassette recorders ( VCRs) give more choice in television programs. Many viewers tape shows to watch later. For example, people who work during the day record daytime news programs, talk shows, movies and soap operas. Parents make collections of children's shows to give their children rainy day entertainment. Sometimes a family goes out for the evening. However, their VCRs keep them from missing their favorite prime time shows. With VCRs, people can fully enjoy the convenience they bring and will not miss their favorite television program.
【正确答案】：Video cassette recorders ( VCRs) give more choice in television programs.
【题目解析】：p161
