Question

选择题。（ ）the door than somebody started knocking on it.

B.I had no sooner closed
C.No sooner have I closed
我选C,但答案选B，为什么？答案有错吗？

Answer 1

是选B，时态错了。整个句子的时态是过去的。No sooner...than(一...就...)引导的从句，可以置于句首，但是要用部分倒装。C答案如果改为：No sooner had I closed，就是是对的。

B答案就是“No sooner”没有提前到句首，所以不用倒装，也可以。

Answer 2

就选B
选C的话，要改一下No sooner had I closed
关门这个动作应该在started之前发生吧？

no sooner... than... "一...就..."

引导时间状语从句,主句用过去完成时,"than"后面的从句用一般过去时.(从这里可以知道,no sooner后面是主句;than后面是从句)
例:
I had no sooner reached home than it began to rain.
我一到家天就下起雨来
No sooner ...than...常放在句首,表示强调.这时主句要倒装.
例:No sooner had I reached home than it began to rain.

Answer 3

B no sooner...than的主句用过去完成时（had+过去分词），than后用一般过去时。因为B项的时态是过去完成时而C项的时态是现在完成时，过排除C选B。

Answer 4

后句started是过去时
所以主句中我的动作应该选择过去的过去
就是had而非have

Answer 5

c中倒装应将have改为had，后closed为close