They need to take (the No.88 bus).(对括号部分提问)____ bus do they ____to take?

问题描述:

They need to take (the No.88 bus).(对括号部分提问)____ bus do they ____to take?
You should never drive after drinking(改为祈使句)___ ____after drinking!

Which need
Never drive(或者Don't drive)