問題詳情
Ordinary toilet paper is not a problem for 41 . It disintegrates rapidly, after being 42 , into the fibers from which it is made. Wet-wipes are different. To keep them 43 while damp, before and 44 use, their fibers are held together by resins. But these resins also hold them together after use, 45 they do not disintegrate.
【題組】41.
(A) sew
(B) sews
(C) sewers
(D) sewing
參考答案