76. He has much experience in _____ beginners.
A. teach
B. teaching
C. taught
D. to teach
77. They insisted _____ the Zoo that day.
A. to visit
B. to be visiting
C. in visiting
D. on visiting
78. He was too excited _____ a word.
A. to say
B. saying
C. said
D. say
79. This room is quite comfortable _____ .
A. living in
B. lived in
C. to live in
D. to live
80. The brakes need _____ .
A. adjusting
B. adjusted
C. to adjustement
D. to adjust
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