1.选B.首先,have been to...表示已经去过什么地方,现已经返回.
所以询问他待多久,应该使用一般过去式.
2.whose whose parents were dead in the accident 定语从句,修饰先行词the girl
1.选B.首先,have been to...表示已经去过什么地方,现已经返回.
所以询问他待多久,应该使用一般过去式.
2.whose whose parents were dead in the accident 定语从句,修饰先行词the girl