大学英语：search

　　5. search for

　　The police are still searching for survivors of the plane crash.

　　They are searching the wood for the lost child.

　　6. worth

　　This bike is worth 250 yuan.

　　I don't think a two-day vacation is worth much.

　　7. respond to

　　How did he respond to what you said?

　　8. rather than

　　He is a writer rather than a teacher.

　　Rather than cause trouble， he left.