【单选题】Yunnan province in China was attacked by such a terrible drought this early spring ____________few people had experienced before, ____________ made us worry about global climate changes.
【简答题】Although there is no possibility of living completely free of stress , it is possible to pr stress as well as reduce its effect when it can’t be avoided. The US Department of Health and Human Ser...
【简答题】Read the following passage and decide whether they are true (T) or false (F). Tourism is a modern business, or industry. In the days before inexpensive means of transportation, only the wealthy could ...