1. because
2, because
3, because of
4, because of
5, because of
6, because of/because of
7, because
8, because
9, because of
10, because
1, He didn't come because he is ill
8, Mary can't sleep because of her having drunk a cup of strong coffee
9, He wasn't late for the first train because he got up early
10, He was accepted for the job because of his having much experience
