It's always safe to travel on land. But there
are some people who want to travel in 1.d ____ places. One of these places is
the Arctic Ocean(北冰洋).
Men do not cross the Arctic Ocean very often.
It is full of danger. It is dark and 2. c_______ there in winter. The ice is
dangerous too. In summer the ice 3. b________ and moves quickly.
In February 1968, John William started to 4. e_______
Arctic. He went with three men and several d 5
. The dogs pulled the sledge(雪橇)over the ice, and on the sledge there was
food and other things for them. They travelled slowly
for five months.
In the summer the ice broke, 6. s______ they
had to stop and 7. w_______ for the cold days to come. Then when the ice was
hard, they started their 8. j_______ again. They stayed on a big piece of ice.
The ice moved in wind and took them to the north. 9. D_______ their journey, an
airplane dropped some food for them. On April 6, 1969, they 10. r_______ the
North Pole (北极).
Then they travelled to the south. They came back and
reached the land on May 29.