a. write the correct form of the verbs (the present continuous tense- thì hiện tại tiếp diễn) 1. He (read) books now. 2. Lan (play) chess now. 3. My children (jog) at this time. 4. They (walk) to school at present. 5. He (arrive) to school at this time. 6. She (chat) with her friends at present. 7. Their mum (sit) in the room at this time. 8. He often goes to school on foot, but today he (go) by bike. 9.Look! He (eat) cakes. 10.Be careful! He (play) with matches. 11. Where is Lan? --She is in the room She (learn). 12. you (talk) in the class now. 13.Lan along with her friends (chat) now. 14. Both Lan and Hoa ( stay) at home now. 15.My dad (swim) now. 16.My children (skip) at this time. D17.They (not play ) chess now. 18.She (not lie) on the beach now. 19. He (not walk) to work at present. 20.Mai (not travel) to Ha noi at the moment. 21.Ba (not run) to school now. 22.My teacher (not teach) at present. 23.Their dad (not wash) the clothes now. 24.They (not skip) at the moment. 25.Look! He (not do ) homework now.