Listen to the whole passage
Listen to the whole passage once first, then practice sentence by sentence.
The first line is the other person opening the conversation; the "You" lines are suggestions for you to practice saying in this scenario (not a back-and-forth dialogue).
A shopkeeper
你好，你要买什么？
Hello, what would you like to buy?
You
我要买苹果和水。
I'd like to buy apples and water.
You
苹果多少钱？
How much are the apples?
You
水多少钱？
How much is the water?
You
一共多少钱？
How much is it altogether?
You
这是十块钱。
Here's ten yuan.
You
谢谢，再见。
Thank you, goodbye.