A group of young Americans have come to Beijing for a visit. Half of them, ___is, 50 persons, can speak Chinese fluently.
85. He insisted that the sky ______ clear up the following day.
86. Wang Lin was elected ______ all he was the tallest.
87. His teaching _____ was raised to twelve hours a week in college.
88. Lying in bed, he was _______ awake with his eyes fixed on the ceiling.
89. He was so tired that as soon as he lay down he fell _______ asleep.