Question

Do you know _____? At the end of July . A when we

'll go abroad. B when will your new book come out C how soon your sister is coming back home.

Answer 1

应该选A

 B when will your new book come out 从句应该是陈述语气

how soon就是距离现在有多久，而不是问的一个独立的时间点，所以回答就应该是还有多少天。