(   )1. _______ more attention, the tree could have grown better. (90’全国)

     A. Given       B. To give        C. Giving         D. Having given.

(   )2. The computer center, ________ last year, is very popular among the students in this school(93’全国)

     A. open        B. opening        C. having opened   D. opened

(   )3. The first textbooks ________ for teaching English as a foreign language came out in the 16^th century.(94’全国)

     A. having written B. to be written    C. being written    D. written

(   )4. ________ is thought, he almost ran into the car in front of him.(96’全国)

     A. Losing      B. Having lost      C. Lost          D. To lose

(   )5. _______ the general state of his health, it may take him a while to recover from the operation.(00’全国春)

(   )6. _______ such heavy pollution already, it may now be too late to clean up the river. (01’全国夏)

     A. Having suffered    B. Suffering   C. To suffer      D. Suffered

(   )7. The researcher is so designed that once ________ nothing can be done to change it.(02’全国)  A. begins            B. having begun D. beginning    D. begun

(   )8. ________ in 1636, Harvard is one of the most famous universities in the United States.(00’上海)

     A. Being founded   B. It was founded    C. Founded     D. Founding

(   )9. When ________, the museum will be open to the public next year. (02’上海春)

     A. completed      B. completing        C. being completed   D. to be completed