I
I disagree with the idea that robots will only bring benefits to people in the future. Robots will also have some negative effects. Firstly, they will be very expensive and we will spend too much money buying and fixing them. Secondly, robots in factories will be able to do everything the workers do, so robots will make them jobless. Thirdly, robots in our homes will do all the housework for us, so we will become lazy and inactive. In short, robots will do many things for us, but they may not improve the quality of our lives.
II
1 If the water weren't contaminated, people wouldn't get more disease
2 If I were you, I would go to the doctor
3 The interview asked me if I went for a walk every day
4 Nick asked his teacher what would happen if the Sun became cooler
5 She told me that letter had been opened
