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        1. Oliver still bought some goldfish ________he found it difficult to raise them.
          A.becauseB.sinceC.thoughD.until
          C
          詞義辨析。Because因為;since   自從,因為;though盡管;until直到。句意:Oliver仍然買了一些金魚盡管他發(fā)現(xiàn)飼養(yǎng)它們很難。所以選C。
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