题干
— May I speak to Lin Tao?
— Sorry, he is not in. He ______ Changsha.
A：has gone to
B：has been to
C：have gone to
D：has been in
答案(点此获取答案解析）
A
— May I speak to Lin Tao?
— Sorry, he is not in. He ______ Changsha.
A：has gone to
B：has been to
C：have gone to
D：has been in
在不同条件下至少可能发生以下有机反应：①取代 ②加成 ③消去 ④氧化 ⑤酯化，其中跟其分子结构中﹣OH有关的可能反应为（ ）
