A、  B、  C、  A提问送达日期(When)，(A)选项告知了具体日期28日早晨，为正确答案。(B)是提问数量(How many)时的回答。此题不能用Yes／No来回答，所以只注意到(C)中的ordered就误认为与问题

How many of those black markers do we have left?
(A)There are only two, I think.
(B)I also have a blue one.
(C)He said to check on the right side.

When is the delivery supposed to arrive?
(A)The morning of the twenty-eighth.
(B)Four boxes of paper.
(C)Yes, Jessica said she ordered one.