问题描述：
He seudied hard in his youth,( ) contributed to his great success in later life.
A:that B:it C:what D.which
选哪个,为什么?中文什么意思
A:that B:it C:what D.which
选哪个,为什么?中文什么意思
问题解答：
我来补答展开全文阅读