题目内容：

根据括号内的要求完成下列各题，每空一词。

1.His musical skills made him very popular. (对划线部分提问)

_________ _________ him very popular?

2.Marcus likes the song because he can sing along with it. (对划线部分提问)

_________ _________ Marcus _________ the song?

3.Carl likes musicians who can play many musical instruments. (对划线部分提问)

_________ _________ _________ musicians does Carl like?

4.Paula likes to play tennis better. (改为同义句)

Paula _________ _________ play tennis.

5.Sue is reading a book. It is about space. (合并为含有定语从句的复合句)

Sue is reading a book _________ _________ about space.