Booking the hotel and the flight ticket is difficult (不是就近,是表示一种概念作状语,谓语动单数)
They have been to GW,haven't they ( 反意思疑问句,主动词否定+主语 用法 ,所使用助动词与前面句子保持一致)haven't they?)
Booking the hotel and the flight ticket is difficult (不是就近,是表示一种概念作状语,谓语动单数)
They have been to GW,haven't they ( 反意思疑问句,主动词否定+主语 用法 ,所使用助动词与前面句子保持一致)haven't they?)