I’m waiting for Jack .________, I will go swimming alone.
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.
—________ I take the book out? —I'm afraid not.