问题
选择题
Oliver still bought some goldfish ________he found it difficult to raise them.
A．because
B．since
C．though
D．until
答案
答案：C
词义辨析。Because因为；since 自从，因为；though尽管；until直到。句意：Oliver仍然买了一些金鱼尽管他发现饲养它们很难。所以选C。
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