Fill in with but, however, although or (even) though.
1 _________________ difficult the situation, at least we have to try
2 _________________ the situation is difficult, we have to try
3 The situation is difficult. We have to try, _________________
4 The situation is difficult. _________________, we have to try
5 The situation is difficult _________________ we have to try
6 _________________ expensive it is, we need it
7 It is expensive _________________ we need it anyway
8 _________________ it is hard, we still need it
9 We need it at all costs. It is hard, _________________
10 We need it, _________________ it is very expensive