Read the following passage and write the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 23 to 27.

     The tourist industry (23) ____________ to be the world's largest industry. The direct (24)_________ 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 (25) _________ worldwide reached 1.04 billion in 2012.

     Such large numbers of tourists, however, are beginning to cause problems. For example, in the Alps the many thousands of skiers are destroying the mountains they come to enjoy. Even parts of Mount Everest in the Himalayas are reported to be covered (26) _________ old food tins, tents, and pieces of equipment that have been thrown away.

     Now there is a new holiday guide (27) _________ is called Holidays That Don't Cost the Earth. It tells you how you can be a responsible tourist by asking your travel agent or your tour operator the right questions before you book a holiday.

 (Adapted from Tieng Anh 9 Workbook - Pearson Education Publishing House)