How time flies! We'll graduate. Three years really s short time. A. was B. are C. is
-What‟s this? - ________.
This is _____ “r” and that’s _____ “u”.
-Dad, this is my friend, Dick. - ________.
-Your watch is very nice. - ________.
This is _____ eraser and that’s _____ gold(黄金) ring.