Надо сделать
II предложения 3 и 4
а в III предложение 4.

II

3) Mark asked Dan if Dan knew the name of that girl

4) Bob asked me where my sister had gone the day before

III

When he met Tom in the park, Tom was reading a book which his sister had given him the week before.

в III /4 можно сказать и ‘THE book’, оба варианта правильные, выбирайте сами)