1,.I met the boy_______________is the president of the corporation.

A.whose father           B.who’s father            C.father of whom    D.of whom father

2,The number of rare animals is deereasing rapidly .

A. dangerously            B. quickly                   C. mostly          D. gradually

3,The chemical ____ from cars and factories make the air, water and soil dangerously dirty.

A. polluted           B. pollution                    C. pollute                          D. pollutants

4. My brother, _______ knows a lot about this sort of thing, told me about what I should do.

A. that                         B. where                      C. who                                    D. whose

5,She is the woman about……………………I told you.

A. whom                                   B. which                    C. that                         D. who

6,. The music to…………………………………….we listened last night was good.

A. that                                       B. whom                   C. where                      D. which

7,The knife ________  we are cutting bread is very sharp. 

  A. with that   B. which                                 C. with which             D. that 

9. Cathy is trustworthy. She’s a person upon _________  you can always depend. 

  A. who                      B. whom                                 C. that                         D. X 

10. The man ____ I introduced you to last night may be the next president of the university. 

  A. whom                   B. that                                     C. X                            D. all are correct. 

11. Your career should focus on a field _________ you are generally interested. 

  A. on which  B. in which                              C. which                      D. that 

12. Research and teaching are of               importance.

A. equal                        B. equally                     C. equality                    D. equalize