3.There are so many people that I had to wait for several hours
->Because of..........
11.My father went on working although he felt unwell
->Despite/In spite of...........
15.He was absent from work although he wasn't sick
->Despite/In spite of...........
60. This seat is not wide enough for us to sit on
->Because of..........
3, Because of many people, I had to wait for several hours 11, Despite/ in spite of feeling unwell, he my father went on working 15, Despite/ in spite of not being sick, he was absent from work 60, Because of this narrow sear, we can't sit on