高等继续教育 / 电子商务英语
正确率：100%
题型描述: 单选题
It is because English is useful ＿＿＿＿＿＿＿＿.
A.which we study hard
B.why we study it hard
C.that we study it hard
D.what we study hard
It is because English is useful ＿＿＿＿＿＿＿＿.
A.which we study hard
B.why we study it hard
C.that we study it hard
D.what we study hard
参考答案：
佳题速递：