—When did the terrible earthquake in Lushan happen?—It happened ________ the morning of April 20, 2013.A. in B. at C. on
----______ is the lady in white? ----She is a nurse.
----Do you know _______ young man under the tree? ----Yes, but only a little, maybe he is _______ university student.
My father goes for a walk daily.
The little girl is fortunate to get help from so many strangers.
I will pay you a visit next month.