The boy ________ on the playground _______ to me that he _______ my coat on the grass.

A．lay, lying, had laid

B．lied, laying , had laid

C．laid, lay, had lain

D．lay, lied, has laid

蓝天明澈，波光云影。周日小兵同学和家人一起外出垂钓，当小兵的鱼钩第一次被鱼咬住时，小兵非常激动，不由得面红耳赤，心跳加快，这是由于人体[ ]

A．神经调节的结果              

B．激素调节的结果

C．神经、激素共同调节的结果   

D．血液循环系统调节的结果