I.    Choose the best answer a, b, c or d to complete the sentence. 1.    Spring water slowly flows through the cavern, ________ limestone.        a. forming              b. carving                      c. eroding                      d. featuring 2.    When spending a week in Berlin, you can ________ the city itself and its surroundings.        a. explore               b. travel                         c. visit                            d. guide 3.    With its ________ climate, the country attracts both winter and summer sports enthusiasts.        a. extreme              b. wet                            c. harsh                          d. varied 4.    Son Doong Cave is one of the most fascinating ______ that can be experienced inSoutheast Asia.        a. journeys              b. expeditions               c. destinations               d. explorations 5.    Nick has just returned from his holiday looking relaxed and ________.        a. cool                    b. worried                     c. tanned                       d. exhausted 6.    Ha Long Bay has twice been ________ by UNESCO as a World Natural Heritage Site.        a. experienced        b. recognized                c. discovered                 d. developed 7.    Our ________ showed us around the old town and regaled us with historical stories.        a. travel agent        b. holidaymaker            c. sightseer                    d. tour guide 8.    The authorities are trying to encourage and ________ domestic tourism.        a. permit                 b. issue                          c. promote                     d. attract 9.    Frog legs are one of the better-known delicacies of French ________.        a. cuisine                b. landscape                  c. recipe                         d. ingredient 10.  Saturdays are busy, so it’s a good idea to ________ a table in advance.        a. offer                   b. reserve                       c. retain                         d. save 11.  We spent the day swimming and ________ around on the beach.        a. exploring            b. turning                      c. traveling                    d. lazing 12.  The seaside resort always gets overcrowded in ________ season.        a. low                     b. peak                          c. off                             d. hard