I ___ Mary in the street yesterday ,we ___ each other since I left school.

Question

I ___ Mary in the street yesterday ,we ___ each other since I left school.
A.met;didn't see B.had met;hadn't seen C.met;haven't seen D.met;hadn't seen
答案上说是C，我觉得应该是D啊？谁能给我讲一下？
还有一题：
They are sitting ___ to the window.
A.closing B.near C.nearing D.closed
这题选B，为什么D不可以？

Answer 1

亲：说话的口气是现在，所以用现在完成时
near to=close to 靠近；接近

Answer 2

前面一句是 yesterday 要用过去式， since句式与完成时配句，两个时间段两比是现在完成时。

Answer 3

选择C
yesterday是过去时标志
说这话的时候是现在说的，现在完成时是对现在产生的影响。追问

还有一题：
They are sitting ___ to the window.
A.closing B.near C.nearing D.closed
这题选B，为什么D不可以？