42．Scientists conducted the three­month research at the Ross Ice Shelf with the intention of ________.

　　A．predicting how climate change influences rising sea levels

　　B．finding out whether there are life forms existing deep under Antarctic ice

　　C．proving the speed of ice flowing into the ocean is controlled by water

　　D．discovering an explanation of the effect the melting ice has on sea level rise

　　43．What made the researchers surprised when they saw the video images?

　　A．Researchers saw fish in the farthest south for the first time.

　　B．A video camera was able to work well under deep icy waters.

　　C．Sediment cores present differences in the history of the ice sheet.

　　D．The drill should dig down 740 meters to collect things.

　　44．From sediment cores taken from the grounding zone, scientists will probably know ________.

　　A．what the ice will do in the near future

　　B．the ice in the grounding zone is melting at the moment

　　C．some differences rarely exist in the history of the ice sheet

　　D．something about the creatures under icy water in Antarctic

　　45．What can be inferred from the passage?

　　A．Scientists will conduct a follow­up study on the frozen continent.

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