19. The chemical used to contaminate the product _____ identified, according to the committee of investigation.
(A) no is yet
(B) not was yet
(C) has not yet been
(D) yet has no be
詳解 (共 4 筆)
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The chemical used to...
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據調查委員會宣稱,這個污染產品的化學物質...
未解鎖
The chemical used t...
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19. 據調查委員會稱,化學品尚未確定用...
私人筆記 (共 1 筆)
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這題考的很精妙,可以從中考出基礎打的好不...