Questions20 to 22 are based on the conversation you have just heard.
A. That a snow cover can cause ice to melt.
B. How heat can prevent ice from melting.
C. How water flows into the ocean.
D. Why volcanoes have a slippery surface.
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1. 现在有不少大学生毕业后开始自主创业；2. 分析产生这一现象的原因；3. 我认为……
Passage ThreeQuestions 33 to 36 are based on the passage you have just heard.
A. Because some of them are inaccessible to new riders.
Because some of them commemorate the development of the bicycle.
C. Because they are nice places to visit on bicycle tours.
D. Because they help to make New Jersey a wealthy state.
Passage ThreeQuestions 33 to 36 are based on the passage you have just heard.
A. Its large number of bicycle clubs.
B. Its geographic variety.
C. Its network of superhighways.
D. Its mild climate.
Passage TwoQuestions 30 to 32 are based on the passage you have just heard.
A. Research assistants.
B. Magazine publishers.
Careless authors.
D. Inexperienced students.
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