一般将来时 be going to 表计划 — 英语选择题
题目
Mia 和朋友们已商定下周沿丝绸之路旅行。下列哪个句子正确地用 be going to 表达了这个已定的计划？A. They are going to visit the Mogao Caves next week. B. They will maybe visit the Mogao Caves next week. C. They is going to visit the Mogao Caves next week. D. They are going visit the Mogao Caves next week.