we have not decided_______ Aif will have a school trip B when we would have a school trip

问题描述:

we have not decided_______ Aif will have a school trip B when we would have a school trip
Cif we will have a school trip

答案C
A 缺少了从句中的主语
B 虽然是虚拟语气的完整句,但是一般前面有not的,后面与if相搭配