Underline the correct verb form in each sentence (Gạch chân dạng đúng của động từ trong mỗi câu sau) 1. I play / 'm playing tennis now. Can I call you back? 2. We usually swim / are swimming on Tuesdays and Fridays. 3. They don't meet / aren't meeting us. They're too busy today. 4. My sister doesn't get / isn't getting much exercise at the moment. She has her final exams.