III. Give the right form of each word in brackets 
 2. He was awarded a prize for his ………contribution ( sự đóng góp )………to world peace (contribute)
 3. Different ………scientists ( các nhà khoa học )……..give different answers to the questions (science) 
4. When she was young, she received some ………scientific ( adj/ khoa học ) ……….training from her father (science) 
5. He is very ………misterious ( adj/ bí ẩn ) ……….about what his work is (mystery) 
V. Change into passive voice
1. People have spent a lot of money on advertising
→ … a lot of money has been spent on advertising ( quảng cáo ) 
2. Is she making a big cake for the party?
→ ……is a big cake being made by her for the party
3. They can’t make tea with cold water
→ ……tea can't be made with cold water
4. They will hold the meeting before May Day
→ ………the meeting will be held before may day 
5. The teacher is going to tell a story.
→ ………a story is going to be told by the teacher