答案是A
这是虚拟语气的句子.Had they had enough time=== if they had had enough time --------这是对已经过去的事情的虚拟/ 假设.
== They didn't visit the Great Wall because they DIDN'T have enough time.
答案是A
这是虚拟语气的句子.Had they had enough time=== if they had had enough time --------这是对已经过去的事情的虚拟/ 假设.
== They didn't visit the Great Wall because they DIDN'T have enough time.