Answers :
1)You can go by a train
2)I’d like a packet of Biscuits ,please.
3)It will be hot and sunny in Hue tomorrow.
4)I drink three bottles.
5)I do exercises in my free time . (I am not 100% sure about this one )
Answer:
Sara is not interested in learning french language. because maybe Sara don't like french language or sara might have something problem with french language to learn.