Read the following passage and mark the letter A, B, C orD to indicate the correct word or phrase that best fits each of the numbered blanks.

The tourist industry (25) _____________ to be the world's largest industry. The direct economic impact of the industry, including accommodation, transportation, entertainment, and attractions, is worth trillions of dollars every year. The statistics show that the number of international tourist arrivals worldwide reached 1.04 billion (26) _____________ 2012.

Such large numbers of tourists, however, are beginning to cause problems. For example, in the Alps, thousands of skiers (27) _____________ the mountains they come to enjoy. Even parts of Mount Everest in the Himalayas are reported to be covered with old food tins, tents, and pieces of equipment that have been throw n away.

Now there is a new holiday guide which is called Holidays That Don’t Cost the Earth. It tells you how you can be a responsible tourist by (28) _____________ your travel agent or your tour operator the right questions before you (29) _____________ a holiday.

25. A. consider            B. is considered          C. are considered        D. is consider

26. A. in                      B. on                           C. at                            D. with

27. A. destroy             B. will destroy                        C. are destroying         D. destroyed

28. A. ask                    B.to ask                       C. asked                      D. asking

29. A. go                     B.book                        C. make                       D. stay