—Cliff，I lost your bike at school.I suppose I should pay for it.

—Oh，________.It was an old bike anyway.

A．Forget it

B．Take it easy

C．OK

D．Don't say so

机场安检过程中，防暴犬功不可没．即便隔着多层包装，防暴犬也能嗅出炸药的气味，这说明组成炸药的分子

A．相互之间存在斥力

B．处于永不停息的运动中

C．相互之间存在引力

D．一直处于静止状态