中文谷Theysolvedtheproblemintheend.YetIreallydon’tknow
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問題詳情：
They solved the problem in the end. Yet I really don’t know ________.
D. how did they make it B. how they made it C. why did they make it
【回答】
B
知識點：賓語從句
題型：選擇題
標籤：
tknow
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