含碳原子数最少且存在同分异构体的烷烃的分子式是　 ____，其同分异构体的结构简式是 ____

用所给词的适当形式填空

短文改错。

    Do you like pop music? Most people did ____. One of the best bands is the New Ocean Waves. In the last twelve  month ____, they've had three major concerts and make ____ a hit CD. They're going to appear in ____ CCTV next month. And then they are going to go on a world tour which ____ they will perform in ten different cities. Be sure not to miss them if they will come ____ to a city near you-- if you can get tickets. For years, we played other peoples' ____ songs,“says leader Zhu Wen. “But now we play most ____ our own songs. We've had few ____ songs in the top ten, but we really hope to have a number one hit some day.” Good lucky ____  to the New Ocean Waves! They're off to a great start. And they're really nice people.

下列命题中正确的是（　　）