摘要：Having been asked to speak at convention, . A. some notes were prepared for Dr. Casagrande B. Dr. Casagrande prepared some notes C. The convention members were pleased to hear Dr. Casagrande D. Some notes were prepared by Dr. Casagrande
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______ the matter a secret , Jim told his father all that had happened .
A．More than keep B．Rather than keep
C．Rather than keeping D．Without having been kept
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I hear you’ve employed Jack, but he didn’t mention _____when we talked on the phone.
A.to employ B.having been employed C. having employed D. to be employed
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________ around the Tian An’ men Square, the tourists from Iceland were taken to visit the Palace Museum.
A. Showing B. Having shown C. Being shown D. Having been shown
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