2道初三英语单选题（急~`)

题目

2道初三英语单选题（急~`)
----Sorry,I don't know.He _____ it this morning
A was writing B wrote C has written D had written
2.I arrived at the airport _____ the plane had taken off.
A while B when C after D before
第2题的答案是C 我想知道为什么选C，选D不可以吗?
第一题补一下 Has your father finished his report?
----Sorry,I don't know.He _____ it this morning
A was writing B wrote C has written D had written

答案

1.A2.C
因为：
1.这句话的意思是：——你的父亲写完他的报告了吗?
——对不起,我不知道.他今天早晨一直在写它.
根据上下文理解句子的含义,我觉得回答者是想表示他的父亲一直在做某事,所以要用过去进行时.
2.这句话的意思是：当我到达机场时,飞机已经起飞.这道题考察的是时间状语从句的连词.A while.当.的时候（正在进行..） B when.当.的时候 C after .在.之后 D before.在.之前.
本题中时间状语从句中用的是过去完成时说明在主句的动作发生时从句的动作已经发生了,所以只能选C.