---Did Peter fix the computer himself? ---He , because he doesn’t know much about computers.
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.
90. We all like Jack because he is a man _____ everybody thinks is pleasant to ______.
91. ______ finding solutions, it is unthinkable to solve all the problems the same way throughout the country.