歼击机的基本武器包括哪些（）。
A、空空导弹
B、空地导弹
C、航炮
D、航空火箭弹
参考答案：A, C, D
— I'm very tired these days because of studying for physics.
— Why not music? It can make you . [ ]
A. listen to; relaxing
B. to listen to; to relax
C. listening to; relaxed
D. listen to; relax
