Unless ______, the boy wouldn’t have admitted that it was he who broke the video.
It is so difficult a problem that _____ student in this class _____ work it out.
.Please make my excuse at tomorrow's meeting. I've got too much work _____.
Our math teacher, however, _____ speak English well.
We're leaving at six o'clock , and hope _____ most of the journey by lunch time .
—Ms Lin looks rather a kind lady. —But in fact she is cold and hard on us. You ____believe it!