注意：此页面搜索的是所有试题
题目内容
（综合英语）
He was much more thorough in his studies than the rest of his class and it was for this reason（ ）he made such great progress.
选项
A: why
B: how
C: that
D: for
选项
A: why
B: how
C: that
D: for
参考答案