Most of her spare time ______ , she still kept on her research in the laboratory.
81. Male and female students are quite different from each other ______ the age at which they begin to develop an intellectual self-discipline.
82. Recently CCTV station has taken great _____ to make a program that reviews the important ______ of the past 20 years.
83. --- I’ve looked everywhere, but I haven’t found any black ink. --- Then, I’m afraid there is _______ left.
84. Not far from the club there was a garden, ______ owner seated in it playing bridge with his children every afternoon.
85. He insisted that the sky ______ clear up the following day.