30．Though not very rich, Ni Ping, a well-known hostess, contributed more than three million yuan to charity (慈善), which ________ other artists in China and inspired more people to help the　 poor.

　　　 A. gave an example of　　　　　　　　　　　　　　　　　　　 B. laid the foundation of

C. set an example to　　　　　　　　　　　　　　　　　　　　 D. threw light on

29．________ what his parents think, he is leaving home for a new job in a big city.

　　　 A. Regardless of　　　　　　 B. Instead of　　　　　　　　 C. In spite of　　　　　　　　 D. In memory of

28．Since the sun can ________ a lot of light and heat, solar energy has been increasingly used in modern times.

　　　 A. give off　　　　　　　　　 B. give away　　　　　　　　 C. give up　　　　　　　　　　 D. give in

27．Two hydrogen atoms and one oxygen atom form a polar molecule, that is, ________ with a slightly positive and a slightly negative end.

　　　 A. it　　　　　　　　　　　　　　 B. that　　　　　　　　　　　　　 C. the one　　　　　　　　　　 D. one

26．It is strictly ________ to clone human beings.

　　　 A. decreased　　　　　　　　 B. abolished　　　　　　　　　 C. forbidden　　　　　　　　 D. guaranteed