Alaska, in 21_______ far north of America, is bigger 22_______

Alaska, in 21_______ far north of America, is bigger 22_______ England, France and Spain put together. The winters are long, dark and cold, but in summer Alaskan children can 23_______ outside at midnight because the sun never goes down! 24 _______ are thousands of lakes, forests and mountains and seventy-five percent of the state has 25_______ roads. Often the only way to go shopping or to get to school is by flying to the 26 _______ town.
Many Alaskans use computers to talk to the outside world. One of 27 _______ favorite hobbies is dog-racing 28_______ the snow. Life in Alaska is sometimes dangerous because of the brown bears living in the forests. At school, children learn what to do 29 _______ they meet one of 30 _______ animals.
回答第（23）空
A、playing
B、play
C、played
【正确答案】：B