Going on a trip_______be expensive and difficult , so making a plan is necessary. A. must B. ought to C. shall D can
Alice is stubborn, as you know. She trusts you and only you can ______ her to give up the foolish idea.
The teacher told us that light ______ faster than sound.
This is her only request that the room ______ after being used.
— I don’t know ______ Mr. Green will come to see us. — He will help us with our English.
—I apologize to you for my rudeness yesterday, Mary? —Never mind, and I think ______ of it.