Question

We (walk) ten kilometres.We (walk) for three hours.You (walk) too fast. That’s why you are tired.I (make) sausage rolls for the party all the morning.How many you (make)? ~ I (make) 200.That boy (eat) seven ice-creamsHe (not stop) eating since he arrived.The driver (drink). I think someone else ought to drive.I (pull) up 100 dandelions.I (pull) up dandelions all day.

Answer 1

We walked  ten kilometres.We have waled for three hours.
You are walking) too fast. That’s why you are tired. 
I have been making) sausage rolls for the party all the morning.
How many have you made)? ~ I have made (или просто made) 200.
That boyhas eaten) seven ice-creams
He hasn't stopped eating since he arrived. 
The driver has drunk). I think someone else ought to drive.
I pulled up 100 dandelions.
I have been pulling) up dandelions all day.

Answer 2

- We walked ten kilometers. It took us three hours. - You walked too fast, which is why you are tired. - I made sausage rolls for the party all morning. - How many did you make? - I made 200. - That boy ate seven ice creams. - He has not stopped eating since he arrived. - The driver drank. I think someone else should drive. - I pulled up 100 dandelions. - I pulled up dandelions all day.