____,George would certainly have attended the meeting.A.If he didn't get a flat tireB.Had he not had a flat tireC.If the tire hadn't flattenedD.Had the tire not flattened.一开始选D了,可是答案是B,请问为什么选B?怎么会有2个had..求解题思路,翻译下
问题描述：
____,George would certainly have attended the meeting.
A.If he didn't get a flat tire
B.Had he not had a flat tire
C.If the tire hadn't flattened
D.Had the tire not flattened.
一开始选D了,可是答案是B,请问为什么选B?怎么会有2个had..求解题思路,翻译下
答