which

1. 對我們來說，很難決定走哪一條路。
   It was difficult for us to decide which road to take.
2. 你正在學哪一段歷史？
   Which period of history are you studying?
3. 我們來到了岔路口，不能決定走哪一條岔路。
   We came to a fork in the road and could not decide which fork we should take.
4. 哪一方將獲得控制權？
   Which side will get the mastery?
5. 哪一本書你讀過了？
   Which book have you read?
6. 蘇伊士地峽位于世界的哪一部分？
   In which part of the world is the Isthmus located?
7. 你喜歡哪一種生活，陸上生活還是水上生活？
   Which do you prefer, life on land or life afloat?

一的英語翻譯：