56. They talked as if they _____ friends for years.
A. had been
B. were
C. have been
D. would be
57. He made me _____ it again.
A. to do
B. do
C. that I do
D. doing
58. Before liberation my father was made _____ from morning till night.
A. to work B. work
C. working D. worked
59. The water is very cold. You had better not _____.
A. to swim
B. swimming
C. swim
D. swam
60. Would you mind _____ me to carry the box?
A. are helping
B. helped
C. helping
D. helps
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