Although you may meet some difficuIties,you should never .
—Where is my ruler?—___________A. Sorry, I don’t know.B. Yes, I know.C. No, it isn’t.
Jim and I ___________ know her family name.A. am not B. aren't C. don’t
—__________?—No, it’s under the chair.A.Is this a video tapeB.Where is the video tapeC.Is the video tape on the table
Look at the hat.__________ on the floor.A.It B.Its C.It’s
—What’s this?—It’s __________ UFO.A.a B.an C.the