D Fill in: am, is, are. e.g. Diane is planting flowers in the garden. 20 Jane and Philip... talking to grandpa. 21 What...... you doing there? 22 I ... going to the park;... you coming with me? 23 ... Luke working on the computer? 24 Mum ... cooking dinner and I ... helping her.

Let's fill in the blanks with the correct form of the verb 'to be' (am, is, are). 20. Jane and Philip **are** talking to grandpa. *Explanation:* 'Jane and Philip' is plural, so we use 'are'. 21. What **are** you doing there? *Explanation:* The subject is 'you', so we use 'are'. 22. I **am** going to the park; **are** you coming with me? *Explanation:* 'I' takes 'am', and 'you' takes 'are'. 23. **Is** Luke working on the computer? *Explanation:* 'Luke' is singular, so we use 'is'. 24. Mum **is** cooking dinner and I **am** helping her. *Explanation:* 'Mum' is singular, so we use 'is'. 'I' takes 'am'.