Ответ:
1 It is Melanie who is planting flowers in the garden.
2 It is Sheila who is listening to the morning news.
3 It was books that make us clever.
4 It was Peter who told me about wild animals.
5 It was Leonardo Di Caprio who acted in ‘Titanic’
6 It was the cockerel that woke us up.
7 It was your news that disappointed me
8 It was my father who sent me a nice postcard.
9 It is doing nothing that makes you very lazy.
10 It was Saturday morning that brought me good news