Question

A huge _____ of quilts was needed in Qinghai province since it was freezing at night

1. A.
   number
2. B.
   plenty
3. C.
   quantity
4. D.
   quality

Answer 1

C
a huge number of ...用的最多，但后面动词应该用复数。plenty of 后面名词是复数是，谓语也应该用复数，也不能选，并且，plenty of 前面也不能用a。所以根据主谓一致，应该选择 C quantity。quality 意思是“质量”，不能选用。