C．how soon they will go to see the children left at home
D．what time will they attend the meeting
答案：C
试题分析：句意：——你能告诉我他们将多久去看看被留在家里的孩子们？——三天后。A. when will they go to the Science Museum他们将什么时候去科技博物馆；B. how long they have been in New York他们在纽约待了多长时间。C. how soon they will go to see the children left at home他们将多久去看看被留在家里的孩子们；D. what time will they attend the meeting他们将在几点来参加会议。此处作为动词tell的宾语从句，词序为：疑问词+主语+谓语+宾语，用陈述语序，故排除AD两项。根据In three days. 可知此处用一般将来时。故选C。 考点：考查宾语从句的用法。