【文章內(nèi)容簡介】
of It’s + adj +to do sth. Practice important more trees It is important to plant more trees. It’s + adj +to do sth. necessary parks clean It’s + adj +to do sth. It is necessary to keep parks clean. right seats the elderly/to It is right to give seats to the elderly. It’s + adj +to do sth. good blind people cro