An elephant is _______than a dog.A.tall B.taller
( )The bus is _________ . A. coming B. come C. comes
( )You must look right_________ you cross the road. A. before B. at C. on
( )We must pay attention _______the traffic lights. A. at B. to C. in
( )We must ______ and wait at a red light. A. stopping B. stops C. stop
( )_______ the No.51 bus over there. A. Take B. Taking C. Takes