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【題目】At times the best doesn't go for us, and we just _____ the existing circumstances.

【題目】We _____ an all-out fight to keep our skies blue, our waters clear, and our land pollution-free.

【題目】A new learning center has been built in the school, ______ students to get to know the world more easily．

【題目】I’m visiting the school ______ my mother taught English ten years ago.

【題目】As is expected, it will be not long before our domestically built aircraft Carriers _____ into operation.

【題目】_________ you reminded me, I knew nothing about the mistake I had made in my term paper.

【題目】With the rising price，I have to _______ quite a lot of things ---clothes，records and so on.

【題目】

【題目】Students show great interest in ______ Professor Edwards presents to them in his class.

【題目】 UN ____ the united Nations.