OG10-39

gheyete

例：OG10-39  For members of the seventeenth-centuryAshanti nation in Africa, animal-hide shields with wooden frames were essentialitems of military equipment, a method to protect warriors against enemyarrows and spears.

A.       a method to protect

B.       as a method protecting

C.       protecting

D.      as a protection of

E.       to protect

答案C。
OG关于D的解释不懂：D。Beginningthe phrase with as is incorrect; using the noun form protection createswordiness 。 as作介词用表示作为不可以么？

gheyete

那为什么OG说它incorrect？

cynthia129

可以，完全可以。但非常不简洁。