C
2 went up
3 have been
4 gave
5 Have you seen
6 took
7 have been
8 had been
9 have you done
10 did you like
D
2. It hasn't rained very much in recent years.
3. People have been doing a lot more to protect the environment recently.
4. Everyone has now realised the importance of recycling bottles and paper.
5. The climate changed a lot since I was a child.
