21. 翻譯：將被污染之貨物以防水帆布蓋上。
(A) Cover the contaminated goods with canvas.
(B) Cover the contaminated goods with blankets.
(C) Cover the contaminated goods with tarpaulins.
(D) Cover the contaminated goods with synthetic net.

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統計： A(2), B(6), C(5), D(0), E(0) #1242880