优优班--学霸训练营 > 知识点挑题
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            • 1. _____in the queue for half an hour,the old man suddenly realized he had left the money in the car.(  )
              A.Waiting
              B.Having waited
              C.To wait
              D.To have waited
            • 2. -The water supply has been off for days.
              -Yes.The workers ________one of the main pipes.(  )
              A.had repaired
              B.have repaired
              C.repaired
              D.have been repairing
            • 3. Charging drivers more money to park will probably work because the traffic jams ______ many cities recently.(  )
              A.have been troubling
              B.troubled
              C.had troubled
              D.was troubling
            • 4. Apple Inc,__________ the way we communicate with its smartphones,released the Apple Watch on March 9,2015in San Francisco,US.(  )
              A.changing
              B.to change
              C.changed
              D.having changed
            • 5. -Are you busy with the coming ceremony?
              -Yes.We ________ for it like this for several days.(  )
              A.had prepared
              B.have been preparing
              C.prepare
              D.prepared
            • 6. — You look great!
              — I ______ out. Check out my muscles!
              A.will work                                                                                       
              B.was working                 
              C.have been working                                                                        
              D.had been working
            • 7. —Have a break,Amy.You _____________ playing the piano all the morning.
                 —OK,Mom.I will stop after this piece.
              A. are practicing  B.have practiced C.have been practicing  D practiced
            • 8. Somebody has to take responsibility for the problems the company        in the past few months.(  )
              A.experienced
              B.was experiencing
              C.has been experiencing
              D.had been experiencing
            • 9.  -Hi,Jack!When did you arrive in Berlin?
                  -Last weekend. I  __________  a different culture since then.
                  A. was experiencing                  B. will be experiencing
                  C. have been experiencing             D. had been experiencing
            • 10. 26.He knows almost immediately she’s the one who he         .
                       A.had been searching                                        B.has been searching
                       C.has been searched for                                    D.has been searching for
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