Your mother be over forty! She looks so young! — Thanks. She will be happy.

What rules you have to obey(服从)?

Oh, Mrs. King, your dress looks nice. Is it new? —No, I ______it since two years ago.

What _____ weather! We can’t go boating today.—I’m afraid we have to watch TV at home.

The teacher said that light ________ faster than sound.