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.