11. At this time tomorrow， we_         _ the mountain.

    A. would have been climbing     B. would climb

    C. will be climbing              D. climb

    12. While the secretary _         _his desk， she found the long lost reports.

    A. had been cleaning   B. is cleaning    C. has been cleaning   D. was cleaning

    13. My brother studies in Beijing University which_         _ in the city of Beijing.

    A. is situated    B. is being situated    C. situated    D. situates

    14. When they _         _， the concert started.

    A. seated     B. were seating    C. were seated    D. were being seated

    15. She didn't remember_         _ a chance to try this method.

    A. to have given     B. to have been given

    C. having given     D. having been given

    16. The police found that the house_         _ and a lot of things

    A. has broken into； has been stolen

    B. had broken into； had been stolen

    C. has been broken into； stolen

    D. had been broken into； stolen

    17. Tim believed that his friend _         _by his boss a month or so ago.

    A. had been promoted     B. has promoted

    C. has been promoted     D. had promoted

    18. He will stop showing off if no notice _         _of him.

    A. is taken     B. will be taken     C. takes    D. has taken

    19. When she _         _ all the magazines， she will come back home.

    A. has sold    B. will have sold     C. sells    D. will be sold

    20. We had hardly sat down when she _         _ plates of food for us.

    A. brought   B. has brought     C. had brought    D. was bringing

    CDACD DAAAA