Odpowiedź:
1. Mark told me yesterday that he isn't going on our class trip the next week.
2. She asked me if I'll be interested to joining.....
3. He was a little scared and said he never tried climbing before
4. They asked us what we wanted to do that day.
5. She said she isn't doing anything special....
Wyjaśnienie:
w 4 nie jestem pewny bo może być poprostu w czasie teraźniejszym czyli "we want to do that day" ale chyba nie może być tak samo to zrobiłem w czasie przeszłym "we wanted to do that day