A even Americans are surprised at the big differences among themselves B there are many differences in character in different parts of the USA C there are many reason for the differences D stereotypes about people are not necessarily true

A New Yorkers are usually open with stranger B People from the South are usually considered good host C The friendliest Americans travel from place to plac D Different parts have different customs and habit

A the weather B the history C geography D the names

A hospital and warm B out going C friendly and helpful D all of the above

A It causes sea levels to ris B It causes sea levels to decreas C It causes sea levels to remain unchange D It causes sea flood all over the glob

A lower water levels B change their opinions C better predict climate change D bury sea-level cities like Dhaka and Shanghai

A The warming of the world's oceans is not a threa B That not enough is being done about global warmin C There is a puzzling gap between the model and observation D Ocean waters have warmed faster than scientists had previously though

A low-lying urban areas B all coastal cities C people who live on the beach D Shanghai

A a great effect on everyone's intelligence B same effect on most persons'intelligence C some effect on a few persons'intelligence D no effect on most persons'intelligence

A increases the ability to think B is the best time for thinking C is better for thinking than is very warm weather D decreases the ability to think