Прошу помогите. Нужно сделать только а.

1.I lose gloves 2.My see classmate 3.I have parents a big meal 4.My sister bue a new mobile phone 5.My best friend hear some good news 6.I pass exam

2. I have just seen my classmate. 3. My parents have just had a big meal. 4. My sister has just bought a new mobile phone. 5. My best friend has just heard some good news. 6. I have just passed my exam.