—The air pollution is terrible.— It will be worse ________ we take action to protect the environment.
Betty writes ___________ than ___________ student in her classroom.
---Who is making much noise? ---It ____ be Timmy. He is sleeping now.
- Mum, could you buy me a dress like this? - Certainly, we can buy_______ one than this, but_______ this.
Something ______ when they made a birthday card.
People in the UK say “holiday” while people in the USA say “”.