Finish each of the following sentences in such a way that it means exactly the same as the sentence printed before it. The weather was bad, so the train was delayed for thirty minutes

PART 7: Finish each of the following sentences in such a way that it means exactly the same as the sentence printed before it.
1. The weather was bad, so the train was delayed for thirty minutes.
Because............................................
2. If he doesn't have a key, he can't get into the house.
Unless he.............................................
3. She had a good salary but she was unhappy in her job.
Although she..........................................
4. She hasn't finished the letter yet.
The letter.......................
5. My kitchen is bigger than yours.
Your kitchen isn't.................................
6. They spend 120 minutes doing this test.
It takes..........................
7. Speaking English fluently is not easy.
It is...................................
8. How deep is this well?
What is.............................?