以上如果是问句:
How long are your parents going to be away for?
或
How long are your mom and dad going away for?
如果不是问句:
Your parents will be away for a couple days.
或
Your parents will be gone for a few days.
再问： 问题是这样的 （ ）are your parents away?
再答： How many days are your parents away? How long are your parents away? 都可以的, 如果是要问几天就第一个, 如果离开较久或没一定时间就第二个.
