lreadyРII. Cloze Test (10 points, 1 point for each item)Р下列短文中有十个空白,每个空白有四个选项。请根据上下文要求选出最佳答案,并将答题卡的相应代码涂黑。РAs temperatures rise and the polar ice caps melt, the race is C to unlock the treasures of the Arctic.Р This region is thought to contain one quarter of the world's untapped oil and gas B, and there's petition D them. America, Canada, Denmark and Norway have all staked territorial claims in the Arctic, and C has Russia.Р Three years ago, a Russian C planted a titanium flag D the ocean floor A the North Pole. It was a symbol of Moscow's A to protect what it sees as its national interest.Р In Moscow this week scientists, businessmen and politicians C Arctic nations will discuss co-operation, but they're also expected to push their countries' B in the region.Р11. A. in B. at C. on D. off