Как ответить на вопрос are they girls?

Yes, they are girls.

Или - Yes,they are. или - No,they aren't.

1. - Will you fly to the sea or go by train? - I will fly; my flight is tomorrow morning.
2. - Whom were you talking to when I met you in the shop? - To my friend. We did shopping together.
3. - How can I get to he station? - I will take you in my car. I am going to the station myself.
4. - Usually Mary makes mistakes in her spelling, but yesterday she did the spelling test rather badly. I hope she is learning  the new words now.
5. They were walking in silence for a long time and then Ben turned to Johnny and smiled, "Why didn't you ever tell me about your family?" he asked.
6. If someone calls, tell them I will be free after seven.

1. - What will you be doing at about 9 o'clock tonight? - I don't know yet. Probably I will be watching television.
2 - What are you thinking about? - My brother. I often think about him these days.
3. When I was younger, I preferred bananas to all fruits, but now I eat only citrous fruits.
4. Yesterday evening, when my sister and I were doing our homework, the telephone rang. I answered it and heard a strange voice.
5. Could you give me a lift? Not today, I am not driving, I'm going by bus. Sorry.
6. Tomorrow after classes John will be working in the library. He usually goes to the library after classes. He prepares for his exams.