Our professor of psychology has writte some very interesting books. I always attend her lectures.
=> Our professor of psychology, whose lectures  I always attend, has writte some very interesting books.
16.Jane has decided to go and teach abroad. Ilt will be an interesting experience for her.
=> Jane has decided to go and teach abroad, which will be an interesting experience for her.
8.My tvo cousins are coming to visit next week. I have seen neither of them for ten years.
=> My tvo cousins, neither of whom I have seen  for ten years ,  are coming to visit next week.
9. And then Mary walked in. We had been talking ahout her earlier.
=> And then Mary, about whom We had been talking earlier , walked in
10. The last time I went to Sootland was in May. The weather was very beautiful then.
=> The last time I went to Sootland was in May, when the weather was very beautiful