阅读下面短文,掌握其大意,然后从各小题所给的四个选项中选出最佳选项。
Good Luck Charlie is an American television sitcom. It is very 1 in the United States. Most people like to watch it.
It tells a 2 of an American family, the Duncans. There are 3 people in the family.They are father Bob, mother Amy and four children,PJ, Teddy, Bab e and Charlotte.
Charlotte is the 4 child in the family. She also has 5 name, Charlie. The little Charlie is very lovely. She always laughs happily and 6 cries. But there is a problem. Bob and Amy can't look after Charlie every day, 7 they have to work. So, they ask the three older children,PJ, Teddy and Bab e to help take care of their little sister. However, it is not a (n) 8 job for them. because they have different problems at school.
Every day after school, Teddy makes a video diary of himself for Charlie. In the video diary,Teddy always 9 some advice to Charlie about school life. And at the end of the video, Ted would always say,"Good 10 Charlie."That's why this sitcom is called Good Luck Charlie.