III
2, contribution
3, scientists
4, scientific
5, mysterious
V
1, A lot of money has been spent on advertising by people.
2, Is a big cake being made for the party being made by her?
3, Tea can’t be made with cold water.
4, The meeting will be held by them before May Day.
5, A story is going to be told by the teacher.
Chúc bạn sức khỏe và học tốt nhé!