В пробирки с серной кислотой добавили по капле выданных индикаторов

1.It is easy to learn the irregular verbs. 
2.I learnt the words on the page ten but i haven't read the text yet. 
3.What time it was when the lesson began? 
4. I could hardly say a word. 
5 What were they doing when the teacher came into the classroom? 
6 If I see him tomorrow, I will give him the book. 
7 Mary has been studying Italian for two years. 
8 I wish i had a computer at home. 
9 Bill did not want to see that film. He have already seen it.