英语虚拟语气It's strange that she _____ without saying a word.A.sh

英语虚拟语气
It's strange that she _____ without saying a word.
A.should have gone out B.went
C.should go out D.goes out
虚拟语气里的题,我认为应该是C,答案说是B.没给解析,
I insist upon repeating to you that _____ that my life should be as it is,I _____ No.
A.if I konw;will say
B.should I konw;would say
C.if I had konwn;might say
D.had I known;have said
我算是看懵了,句子成分有点混乱.