35. Nothing else 　　　　　more important than water in the place like a desert.

A. we can't find　　 　　 B. can't we find　 C. can we find　　 　　　 D. we can find

34. _________ in the school rules that boy students should not wear long hair.

　　 A. What is required　 B. What requires　 C. It is required　 D. It requires

33.　 Tom was kept in the classroom after the exam because he was caught _______.

A. cheat　　 B. to cheat　　 C. cheating　　 D. cheated

32. ________ around the lab, the visitors were taken to the playground.

A. Having shown　　　　　　　 B. Having been shown

C. Being shown　　　　　　　 D. To be shown