Question

 unless  even if  because  in case  although

1. I'll get there,        I have to walk.

2. I was late this morning        the bus I took got held up in a traffic jam.

3. Tom,take another coat,        it is cold at the top of the mountain.

4.        he failed many times,he was still full of confidence.

5. She says that she'll have to close the shop        business improves.

Answer 1

 1. even if   2. because   3. in case   4. Although  5. unless