A:Who
B:What
C:Where
I didn't hear your call because I ______ to music at that time.
Kitty can see many kites in the classroom.
下边漫画主要启示我们,在“行为前”要( )
①只有不断学习,才能适应不断发展的社会
②要想有出息,唯一的出路就是读书学习
③学习可以让我们拥有更好的生活
④只要努力学习,我们就能拥有一切