We have gathered nearly 100,000 quilts, up to half have gone to the flood-hit areas.
A. with which
B. in which
C. for which
D. of which
网友回答
A. with which
B. in which
C. for which
(答案→)D. of which
解析：which指代先行词quilts，介词of表示“部分”，定语从句的正常语序应该是up to half of which (= 100,000 quilts) have gone to the flood-hit areas。