A. must have had B. must have
C. must had had D. must have been
A. All B. What C. Which D. That
A. command B. demand C. effort D. favor
A. it B. this C. which D. that
A. has been warned B. have been warned
C. has warned D. have warned
A. acted B. influenced C. effected D. affected
A. upset B. bored C. disturbed D. neglected
A. a good brain B. a good intention
C. good judgement D. good imagination
A. working out B. having worked out
C. having been worked out D. to have been worked out
A. working out B. having worked out
C. having been worked out D. to have been worked out
A. circumstance B. request
C. reception D. response
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