71. I could hear him _____ to and fro in the next room.
A. walking
B. walked
C. to walk
D. walk
72. Suddenly he felt someone _____ his head.
A. had touched
B. touched
C. touches
D. touch
73. I need a day or two _____ .
A. to think it over
B. to think over it
C. think it over
D. of think
74. Mrs.Green asked Mr.Green _____ open the window.
A. to
B. please
C. will
D. would
75. He ordered his soldiers _____ up straight.
A. stand
B. stood
C. standing
D. to stand
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