Chia động từ trong các câu dưới đây

Chia động từ
6.Mai ( wear) her new dress at this time.
7. Now , he  ( watch ) ice age on video.
8. Look ! The girls ( skip) in the school yard.
9. They (do ) judo in the gym now.
10. My friends (ride ) to school with me at present.
11 he (study ) Maths now ?
12 Mr Lee ( have) lunch with his students at the moment.
13. Ms Huong ( teach) the class Maths now.
14 Where are you, Ba ? I ( do) my homework upstairs.
15 Listen ! They ( sing ) in the classroom.
16 What you (do)now ? I (cook) dinner.
17 We (not go) to school at present . We (go) to the zoo.
18 The students (not study) Maths now . They (study) literature.
19 Be careful ! The bus (come)
20 What your mother (do) now ? She (clean) the house
21 your father ( watch) TV at present ? No, he (read) books
22 you (play) soccer at this time ? No, we (play ) badminton 
23 What they (do) now ? They (study) physics
24 the children ( fly) kites at the moment.
25 Mr and Mrs Brown ( travel) to HN now.
26 How you ( go) to school at present ? We ( walk) to school
27 Vy (not do) her homework now . She (write) a letter to her friend.
28 I can't go out now. It (rain) heavily.