35. Alva found a large cave in the hillside ___ he decided to use as his first laboratory.

　 A. where　　 B. which　 C. what　　 D. in which

34. ---What happened to the trees planted last spring? ---The trees ___ well. But they didn’t take good care of them. A. would grow 　B. shall have grown 　C. would have grown 　D. might grow

33. Anyone who wishes to succeed should be brave, ____, they won’t make a difference in their life.

　 A. although　 B. while　　 C. however　　 D. otherwise

32. Einstein liked Bose’s paper so much that he _______ his own work and translated it into German.

　 A. gave off　　 B. turned down　 C. took over　 D. set aside

31. We did all we could to ____ the girl, who had been feeling down because of her failure in the job interview.

　 A. adjust　　 B. comfort　　 C. toast　　 D. recommend

30. The trees in that thick forest are so close together that there is hardly any room to move ___ them.

　 A. among　　 B. between　　 C. across　 C. in