----- Nội dung dịch tự động từ ảnh ----- Ex3. Rewrite the following sentences, beginning as shown, so that the meaning stays the same. 1. It is necessary for us to be present at the class discussion on Saturday. ur We 2. The tour guide tells us not to throw rubbish. The tour guide says that we 3. Don't drop litter. You 4. They don't allow children to travel alone. or Children 5. Their rule is wearing a swimsuit in the pool. You