17. For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment, a method to protect warriors against enemy arrows and spears.
(A) a method to protect
(B) as a method protecting
(C) protecting
(D) as a protection of
(E) to protect
answer is e)
i wonder why c) is not good as e) is that protecting is ambiguous because of 'for numbers'...??
你这是哪里来的题和答案？
这题是OG39，答案是C.
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