91. You may use the book as you like, _______ you keep it clean.
A. unless B. so long C. as long D. so long as
92. He ________ the world record.
A. failed to break B. failed to breaking C. failed breaking D. failed broken
93. No ________ what you say, _______exists in three states.
A. matter…matters B. matter…matter
C. matters…matter D. matters…matters
94. I wonder what time lunch is_______ in your school.
A. given B. taken C. served D. eaten
95. The people in some countries ________ freedom.
A. longed B. long for C. longing D. longing for
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