问题
Do you know _________—Yes， in two days.
A:when will Mr. Li come back
B:how long Mr. Li will come back
C:how soon will Mr. Li come back
D:how soon Mr. Li will come back;
B:how long Mr. Li will come back
C:how soon will Mr. Li come back
D:how soon Mr. Li will come back;
正确答案是：
