I wondered they had raised so much money on their own to help youngsters in need.
A. what
B. that
C. how
D. why
网友回答
A. what
B. that
(答案→)C. how
D. why
解析：考查宾语从句：句意：我想知道他们是怎么自己筹集到这么多的钱来帮助需要的年轻人的。What在从句中一般做主宾表，而从句不缺主宾表，that在宾语从句中不做成分，但意思不完整，why在宾语从句中做原因状语，也是意思不符合逻辑。选C。