问题详情

SECTION 1 Vocabulary Selection
In the section, there are 20 incomplete sentences. Below each sentence, there are 4 choices respectively marked by letters A,B,C and D. Choose the word or phrase which best completes each sentences. There is only ONE right answer.
If you had done as I told you, this______.
A．should have not happened
B．would not have happened
C．did not happen
D．had not happened请帮忙给出正确答案和分析，谢谢！