Miss Gao left an hour ago.(同义句转换)Miss Gao ____ ____ ____ ____an hour ago 每空一词.

问题描述:

Miss Gao left an hour ago.(同义句转换)
Miss Gao ____ ____ ____ ____an hour ago 每空一词.

Miss Gao has been away for an hour.
Miss Gao has been away since an hour ago.
It is an hour since Miss Gao left.
一二句是现在完成时 因为 leave 是短暂性动词 不能与since 和 for 连用 所以 用 be away
第三句是固定结构 以 It is 开头 since后面还是过去时