問題詳情

【題組】23.
(A) since
(B) while
(C) whether
(D) if

參考答案

答案：B
難度：適中0.477612
統計：A(17),B(32),C(7),D(4),E(0)

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 Many thousand-year-old coins often sell for no more than a few dollars because there are a lot of them around,   23     a 1913 Liberty Head Nickel may sell for over one million US dollars because there are only five in existence. (B) while 儘管  根據文意判斷'