根据所给中文完成句子。
1. 你能告诉我这本书你借了多久了吗?
Could you tell me ____________________________________________________?
2. 史密斯一家习惯于早起。
The Smiths _________________________________________________________.
3. 你最好别和他争论。
You _______________________________________________________________.
4. 他没有选择只好求助。
He has ____________________________________________________________.
5. 我们怀疑他是否会获得此项荣誉。
We doubted ________________________________________________________.
1. how long you have kept the book
2. were/are/have been used to getting up early
3. had better not argue with him
4. no choice but to ask for help
5. whether/if he could/would win the honour
答案不唯一