题干
_____ it rain tomorrow, we would have to _______ the picnic.
A：Would; put forward
B：Should; call off
C：Will; give u
D：Should; put u
答案(点此获取答案解析）
B
A：Would; put forward
B：Should; call off
C：Will; give u
D：Should; put u
，则以下结论中正确的是( )