There is a mistake in each sentence below. Find the mistake and corect it (Có một sai lầm trong mỗi câu dưới đây. Tìm lỗi và sửa nó) 1. She asked him attend the school performance. 2. Don't let her to go to the music festival! 3. Their parents will never agree buy that expensive piano. 4. To develop her musical talent, her father made her to sing at family gatherings.