As the sea ice melts sooner each swimmer,polar bears are forced to come ashore e
题型：不详难度：来源：
As the sea ice melts sooner each swimmer,polar bears are forced to come ashore earlier and face food shortages _____ they have stored enough fat to last them through the season.| A．before | B．unless | C．since | D．until |
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答案
| A |
解析
| 本题考查连词。句意：因为海冰融化得比游泳者早，北极熊没来得及为整季储存足够的脂肪，就被迫提前上岸，面临食物短缺。before conj.在……之前；比……早些。 |
举一反三
____ you have a chance , you might as well make full use of it. | A．Now that | B．After | C．Although | D．Even if |
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| ____time goes by, Mother’s hair is turning gray and the wrinkles on her face deeper. |
_______________made our school proud in 2011 was ____________ more than 40% of the students had been admitted to key universities.| A．What ; because | B．That; what | C．What ; that | D．That ; because |
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—Do you think the weather will be all right this summer?
—No, _____ we are lucky. The newspaper says it"ll be very hot anyway. |
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