A.construct
B.extend
C.create
D.expand
32.What is the ice cover in the Arctic by the end of 2007 summer?
A.4.2 million square kilometers
B.11.4 million square kilometers
C.1.13 million square kilometers
D.38 million square kilometers
33.What are the reasons for the ice melting according to the scientists?
A.strong winds and clear skies
B.long summer and short winter
C.open water and thin ice
D.light clouds and light winds
34.Why is the ice melting from both above and below?
A.Because extra heat warms the air.
B.Because extra heat warms the water.
C.Because the temperature above the water is higher.
D. Rnth A and B.
35.What can be a possible title for the passage?
A.What are scientists looking for in the Arctic Ocean?
B.What are scientists doing in the Arctic Ocean?
C.Why are scientists worrying about the Arctic Ocean?
D.Why are scientists interested in the Arctic Ocean?
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