21. Maintaining biodiversity is important _______us in many ways.

​A. in​B. for​C. from​D. by

22. We benefit greatly ____________the medicines and other products that biodiversity provides.

​A. from​B. without​C. for​D. at

23. Governments have enacted laws to protect wildlife ________commercial trade and overhunting. 

​A. from​B. without​C. for​D. at

24. It’s is enough to dip__________ this book.

​A. for​B. at​C. into​D. about

25. Not all books belong _________this class.

​A. in​B. to​C. for​D. at

26. When you pick _________a book for the first time, check that it is not too difficult.

​A. in​B. since​C. on​D. up

27. A game is divided ____________quarters.

​A. from​B. into​C. at​D. of

28. Vietnam carried _________an intensive program for its athletics, which included training in facilities, both home and abroad. 

​A. for​B. at​C. out​D. of

29. They considered women to be better suited ________childbearing and homemaking.

​A. of​B. on​C. to​D. for

30. Do you know anyone who might be interested _________buying an old car?

​A. on​B. in​C. with​D. about

31. Mozart died ________ Vienna in 1791 _________ the age of 35.

​A. in / on​B. in / at​C. at / in​D. of / for

32. Plant and animal extinction leads _________ loss of biodiversity.

​A. on​B. in​C. into​D. to

33. The initiative for founding the Red Cross came _____ a Swiss man called Jean Henri Dunant.

​A. from​B. with​C. through​D. to

34. Pay attention _______all traffic signs when you are travelling in the street. 

​A. for​B. on ​C. to ​D. from 

35. Reviewers describe books _______ "hard-to-put-down", or "hard-to-pick-up-again".

​A. as ​B. for ​C. into ​D. in