他先把房车从卡车后面摘下来，然后才去加油。

He ___unhitched the RV from the truck before going to refuel.

他把拖车从卡车上解开了。

He ___unhitched the trailer from the truck.

拖车在崎岖的山路上突然脱钩了。

The trailer ___unhitched suddenly on the rough mountain road.