阅读下面短文，根据第73至第75小题的具体要求，简要回答问题。

The north magnetic pole (磁极) is no longer a resident of Canada. It has drifted across the Canadian Arctic and is now angling toward Siberia.

Not to be confused with the geographic North Pole—the northern extremity of the Earth’s axis（地轴），the north magnetic pole (where the Earth’s magnetic field is directed downward) is moving due to natural changes in the Earth’s magnetic field, a process that originates about 3, 000 kilometers below our feet, in the outer core（核心）of the planet. But scientists are now noticing that the magnetic pole has picked up its pace.

Over the past century, the pole has been migrating at an average speed of about 10 kilometers per year, says Larry Newitt, head of Geomagnetic Laboratory at Natural Resources Canada in Ottawa. Since the 1970s, this speed has increased to about___50___kilometers per year.

Scientists are wondering why the speed is increasing, says Newitt. One Hypothesis (假说) relates it to “magnetic jerks”, sudden shifts (变化) in the rate of change of the magnetic field. There have been three jerks in the past four decades, each one correlating to an increase in speed.

If the north magnetic pole continues at its current rate, it could reach Siberia by 2056.

“For most of recorded history, the pole has been a part of Canada, and now it’s not,” says Newitt. “It may be a blow to our collective psyche, but other than that, it doesn’t have a major effect on most people’s existence.

73. Find in the passage a word closest in meaning to the underlined word “angling”.

___________________________________________________________________________________

74. What could happen to the north magnetic pole by the middle of the 21 century? (回答词数不超过8个)

___________________________________________________________________________________

75. What is the main idea of the passage? （回答词数不超过8个）

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第四部分 书面表达（共两节，满分35分）

第一节 填空（共10小题，满分10分）

阅读下面短文，根据所读内容在文后第76至第85小题的空格里填上适当的单词或短语。注意：每空不超过3 个单词。

Host family accommodation, or living with host families, remains popular among language travel students for its advantages. These days, host families are trying to offer more in terms of quality, for they still have something to worry about.

Host family accommodation is often seen as the number-one choice for its advantages in language study, cultural communication and cost of living. Staying alongside host families enables students to get enough practice for the short time of their studying so that their language acquisition is likely to become faster. Living in host families also has the advantage for students of being able to spend a lot of time communicating with their “host parents”, and get to know the local way of life, people and culture. Another advantage is that host family accommodation can sometimes be the least expensive. It attracts students for it ensures them a family type of living at a low cost.

The advantages, however, have not prevented host families form worrying. On one hand, some host families are losing their unique selling point. The problem is that the majority of hosts in big cites, now generally single and young, have less times available for students but the selling point for host family accommodation is communication practice. One the other hand, students’ expectations have risen. They are becoming more demanding and asking for more than ever from their accommodation, as they come mainly from high socio-economic groups in their own countries.

To get out of the difficult situation, host families are now making efforts to improve the quality of service. They are trying to making living conditions better, including broadband Internet service, private bathroom, and access to plenty of hot water for long showers. They are also providing students with structured family activities.

It is believed that host family accommodation will keep the popularity vote with language travel students.

Title: 76. ______

Theme
Host families are improving the accommodation quality

77. _______
1）Language study
78. ______

2）Cultural communication
(1) 79. _______

(2) Knowing the local way of life, people and culture

3）80. _______
Being least expensive sometimes

81. _______
1）Loss of selling point
Hosts’ having less time for students

2）82. _______
Students’ becoming more demanding

83. _______
Service quality improvement
(1) 84. _______

(2) Organizing structured family activities

85. _______
Host family accommodation will keep the popularity vote with students.