Large quantities of information＿＿＿since then as to how the program has worked.
A．has been offeredB．were offeredC．have been offeredD．was offered
C

試題分析：句意：自從那時起，大量的關(guān)于這個項目怎么運作的信息已經(jīng)被提供。和since then連用，應(yīng)該用現(xiàn)在完成時，排除BD，因為主語是Large quantities of information，謂語和quantity的數(shù)保持一致，所以用復(fù)數(shù)，選C。
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