Срочно нужно!!! СПАСАЙТЕ!!!

Исправьте одну ошибку в каждомпредложении.
1. In Europe, 16 tonnes of material is used per person per year, of which six tonnes become waist.
2. Jeremy is untrustworthy. Last Monday he promised to help me with some redecorating and I thought he’ll keep his promise but he didn’t.
3. No one believed he deserved to be called a writer but his lastest book was a real sensation. 
4. In Cardiff where I was born I used to spend lots of time in parks full of marvelous roses and now I’m giving you this rose – the symbol of my land and my love.

1. In Europe, 16 tonnes of material is (are) used per person per year, of which six tonnes become waist. 2. Jeremy is untrustworthy. Last Monday he promised to help me with some redecorating and I thought he’ll (he would) keep his promise but he didn’t. 3. No one believed he deserved to be called a writer but his lastest (latest) book was a real sensation. 4. In Cardiff where I was born I used to spend lots of time in parks full of marvelous roses and now I’m giving you this rose – the symbol of my land and my love. (Не вижу ошибку. Возможно, имеется ввиду правописание слова marvelous (это американский вариант) - marvellous (это британский)