4. Denis was rewarded for have taken an active part in the Green Summer activities.
             A                    B            C                         D
5. Having not ridden a horse for a long time, I found it very difficult to sit on the saddle
          A                                B         C                     D
6. The book publishing last week is her first novel about a World Heritage Site in Viet Nam.
             A               B         C      D
7. He works at Heathrow Airport, that is one of the big airports in the world.
    A                           B                     C                                D                 
8. Amy seems like a bright student. She's always the first one to be finished her work. 
        A       B                 C             D
9. I was unable to understand the lecture making by Mr. Frank because I was right at the back of the hall.
        A            B            C                                             D
10. Having change our attitude to nature, we started changing our behaviours as well.
      A             B            C           D