I’ve lived in New York and Chicago, but don’t like ____ of them very much.
_____ 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.
When I talked with my grandma on the phone, she sounded weak, but by the time we ___ up, her voice had been full of life.