—I really don’t know whether I should tell my father about the exam.—Well, don’t speak until ________.
The number of people invited ___ fifty, but a number of them ___ absent for different reasons.
Many people agree that ___ knowledge of English is a must in ___ internationsl trade today.
Tom felt that he knew everybody’s business better than they knew it___.
John, you ___ play with the knife, you __ hurt yourself.
---When shall we meet again?---Make it ___day you like;it’s all the same to me.