Choose the correct answer

16. In most football matches, referees often wear________black.                A. in      B. for   C. with D. on

17. We benefit greatly ________ the medicines and other products that biodiversity provides.

                                           A. from                         B. without                      C. for     D. at

18. While studying, he was financially dependent________his parents.       A. of      B. to     C. from            D. on

19. The telescope will photograph distant galaxies,________attempt to understand their past.

                                           A. in                              B. for                             C. on     D. with

20. The issue________question is more complex than we think.                  A. in      B. from            C. on    D. at

21. I________was only absent________the office for a few minutes!         A. for    B. from            C. in     D. about

22. The old manager has just retired, so Tom takes________his position.     A. in      B. on    C. up    D. out

23. I’ve just spent two weeks looking________an aunt of mine who’s been ill.         A. at     B. for   C. out for         D. after

24. Were you aware________the regulations against smoking in the area?   A. in      B. with C. of    D. about

25. My uncle took________golf when he retired from work.                       A. on     B. after            C. up    D. over