29. If we want to reduce pollution, we have to make_________changes in the way we live. A. dramatic B. little C. medium D. special 30. ___________ is the destruction of the earth's surface caused by the misuse of resources and improper dumping of waste. A. Noise pollution B. Air pollution C. Land pollution D. Light pollution 31. The Statue of Liberty___________over 12 million immigrants entering the USA through New York Harbor since 1900. A. welcomes B. is welcoming C. welcomed D. has welcomed 32. At present, the National Cherry Blossom Festival __________in Washington. D.C. to celebrate spring's arrival. A. occcurs B. is occuring C. has occurred D. occured 33. In Canada, the handshake should be firm and accompanied by direct eye contact and a_________smile. A. sincere B. fake C. funny D. serious