Read and choose.
Mary: Hi Sara. What are / is / do you doing?
Sara: Hi Mary. I'm doing my homework.
Mary: Are you feel / feeling / feels bored?
Sara: No, I not / I am / I'm not. I'm study / studying / studing science, and it's interesting.
Mary: Is your brother helping you?
Sara: No, he isn't. He / Hes / He's helping Mom with cooking.
Mary: And your sisters? What aren't / is / are they doing?
Sara: They are'nt / aren't / isn't studying, or cooking. Their / There / They're watching TV!
Sara: Hi Mary. I'm doing my homework.
Mary: Are you feel / feeling / feels bored?
Sara: No, I not / I am / I'm not. I'm study / studying / studing science, and it's interesting.
Mary: Is your brother helping you?
Sara: No, he isn't. He / Hes / He's helping Mom with cooking.
Mary: And your sisters? What aren't / is / are they doing?
Sara: They are'nt / aren't / isn't studying, or cooking. Their / There / They're watching TV!