Don’t use water to put out the fire if oil catches fire. As is known, oil ________ float on water.

Every year, when the peach blossoms are at their best, a festival_______at Beijing Botanical Garden

An excellent teacher is believed to be one who devotes (奉献) himself to the children but asks for nothing .

His timely warning was_____ help us avoid being cheated

Why are you so depressed? —I _____ my MP4 player on the bus