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            • 1. Technology is developing so rapidly that _____ for only a year, my cellphone is out-of-date.

              [     ]


              A. using
              B. having been used
              C. having used
              D. is using
            • 2.
              __________ for several hours, they came to realize that they had a lot in common.

              A. Having chatted
              B. chatted
              C. To chat
              D. Chatting
            • 3.
              _____ at college for 3 years, she knows the place very well.

              A. To have studied
              B. Having studied
              C. Studying
              D. Studied
            • 4.
              _____ himself with necessary knowledge and skills, the young man went to the job market with much confidence.

              A. Equipped
              B. Equipping
              C. Having equipped
              D. Being equipped
            • 5. _____ on the subject for half an hour, Liu Ying suddenly stopped.
              [     ]

              A. To be worked
              B. To work
              C. Having worked
              D. Having been worked
            • 6.
              She went to the supermarket and _____ what she needed, she returned home, light-hearted.
              A. bought
              B. having bought
              C. buying
              D. to have bought
            • 7. _____ all day at home writing, the novelist went out for a walk in the evening.
              [     ]

              A. Spent
              B. Spending
              C. Having spent
              D. Having been spent
            • 8. ____ the chapter four times, I finally understood the author's theory.
              [     ]

              A. Reading
              B. Having read
              C. To read
              D. Read
            • 9.
              ____ the computer competition quite well, he won the first prize.
              A. Preparing
              B. Having prepared
              C. To prepare
              D. Prepared
            • 10.
              _____ in the queue for half an hour, the old man suddenly realized be had left the cheque in the car.

              A. Waiting
              B. To wait
              C. Having Waited
              D. To have waited
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