Did you hear the sound like that of a door _____?
Days later, my brother called to say he was all right, but ________ say where he was.
The door ________ open, no matter how hard she pushed.
—Shall I inform him of the change of the schedule right now? —I am afraid you ________, in case he comes late for the meeting.
I ________ use a clock to wake me up because at six o'clock each morning the train comes by my house.
What do you mean, there are only ten tickets?There________be twelve.