39. 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
1.請問為何E需要+used
如果E要+used的話,那為何C不用+呢?
2.A是錯在要用a method of 媽? 為何不可以用to表目的呢?