——Why did you leave without a word of warning to John? ——But what_____________otherwise? He never listens to me.
—John and I will celebrate our fortieth wedding anniversary next month. —Oh, _________!
_____ I admit that there are problems, I don't' think that they cannot be solved.
As your instructor(教师) advised, you ought to spend your time on something ____ researching into.
_____ the fact that his initial(开始的)experiments had failed, Pro. White persisted (坚持) in his research.
—Do you have enough to ________ the cost of your board at school? —Oh yes, enough and to spare.