任务型阅读(阅读下面短文，然后根据短文内容填一正确的单词。答案书写于答题卡卷II各小题规定的位置。)
Have you ever seen the film Titanic? “Titanic” was one of the largest and finest ships in 1912. It hit an iceberg(冰山)on its first sailing from England to America and sank very soon, leaving a love story to the people. Do you know what an iceberg is?
The earth is round, like a ball. The top of the earth is the north. The bottom of the earth is the south. At the top and the bottom of the earth, there is a lot of ice. It is very cold there. Sometimes there is no sunshine for many months. There is ice everywhere all the time. Large pieces of ice fall into the sea. They don’t go to the bottom of the sea. They float(漂浮)near the top of the water. We call these large pieces of ice “iceberg”. Some icebergs are bigger than a tall building. Icebergs are dangerous for ships. Sometimes a ship hits an iceberg.
Then the ship sinks.
You can make a small iceberg. Put a piece of ice in a glass of water. Look ar it. The ice does not sink.
Titanic is the name of a film and it’s also the name of a _______.
Titanic sank ________ it hit an iceberg.
The __________ is very cold in North Pole(北极)and in South Pole.
At times we can’t see the ___ in North Pole and in South Pole for a long time.
cebergs are made of large _________.