---Please tell me what really happened.

---Oh, I _________, and I hit a parked car.

A．wouldn’t pay attention

B．didn’t pay attention

C．haven’t paid attention

D．wasn’t paying attention

S型离心泵安装时，进水管口和泵出水口连接处必须装（）。

A、阀门

B、偏心管

C、渐细管

D、偏心渐细管