If you go on the road,you must know the________.A.traffic rules B. traffic C.lights
( ) These green trees. A. is B. are C. was
( ) The birds are playingthe rain. A. on B. in C. at
( ) Baby, pleaseto your room. A. goingB. goC. to go
( ) Amy’s playing piano. A. the B. a C.\
( ) A cat is. A.run B. running C. runing