Below is an advertisement in a travel brochure． Book this package There are few areas better than Lake Myvatn for viewing the Northern Lights and discovering the wonders of the Icelandic winter． Day 1 Reykjavik—Akureyri—Lake Myvatn Flight to Akureyri from where you will be picked up．Transfer to Lake Myvatn．Sightseeing tour of the Lake Myvatn area．After the tour an introduction of the activities available． Day 2 Free day at Lake Myvatn: optional tours available．Please note that all tours are dependent on weather and road conditions, and therefore only booked locally at Lake Myvatn． Day 3 Akureyri—Reykjavik The morning will be spent at Lake Myvatn and then in the afternoon a transfer to Akureyri where you will go on a short sightseeing tour of Akureyri enjoying the beautiful sights．Afternoon flight back to Reykjavik． Activities available at Lake Myvatn Snowmobile Take an exciting adventure on our snowmobiles out on the frozen Lake Myvatn or travel deep into the Highlands with one of our guides．30 min and 1 hour tour available． Super-jeep Sightseeing at Myvatn and a super-jeep adventure．3 tours available: around the area of Lake Myvatn; a tour to Dettifoss, the most powerful waterfall in Europe and unforgettable at winter time; a tour further into the Myvatn area． Sightseeing tours Sightseeing tours to some spectacular places: Icelandic farms, power station, museums and a search for the northern lights．These tours are recommended for all nature lovers． Cross-country skiing The Lake Myvatn area and surrounding Highlands are great for cross-country skiing．There is a good mixture of areas from easy to more demanding and the length of each tour also depends on one’s ability． Horse riding A wonderful area that offers a great variation of trekking（跋涉）routes．On offer are tours from one hour to a day tour with different destinations, something to match your desire． Go-carts on ice Experience the adventure of driving on the ice of the lake．The snow is taken away and you drive with “nailed” tires．Also available is go-carts in the snow． Winter garden Different kinds of amusements on the frozen lake: bowling, cricket, skating, mini golf etc． 1．What is the purpose of the ad? A．To inform the timetable of a trip． B．To list the steps to see the Northern Lights． C．To introduce a special traveling package． D．To introduce the wonders of the Icelandic winter． 2．Where will you spend most of the time during the trip? A．Reykjavik．              B．Akureyri． C．Lake Myvatn．             D．Icelandic farms． 3．Which activity is not included in the travel package? A．Sighteeing tour of Akureyri． B．Sightseeing tour of Reykjavik． C．Sightseeing tour in the Lake Myvatn area． D．Seeing the most powerful waterfall in Europe． 4．If you want to view the Northern Lights, you will join in _________． A．Horse riding                      B．Cross-country skiing C．Super-jeep                          D．Sightseeing tours