1. Harry didn't turn off his stereo when we came in. (carried) When we came in, Harry __________________ his stereo

2. His answer to the first question is wrong. (mistake) He ______________ the first question 3. She tried as hard as she could, but she failed. (did) She _____________, but she failed

4. Charles Dickens wrote his first novel when he was twenty-five years old (age) Charles Dickens wrote his first novel __________________ twenty-five

Tìm x

\(x+\dfrac{2}{5}=\dfrac{1}{2}\)           \(x-\dfrac{2}{5}=\dfrac{2}{7}\)