Perhaps, language should be looked upon as a ___1______ and a ________2___________: often study the road map (check grammar) and ____3____ the car engine (adjust vocabulary). Learning grammar and a good vocabulary is just like driving with a road map in a ______4__________ car. _____5_____, _____6____, and ___7_______ communication depends upon grammar and a good vocabulary, the two ____8______ assets for students, but they are _________9_______ in schools.