---Will you come shopping with me?

---______, if Tom does.

---What’s one plus two?

---It’s ______．

---Where ______you from, Tom?

---I’m from Australia．

---Whose eraser is this?

---It’s ______．

---Is Alicea doctor？

---No，_______．

---______ does it take to get to your school on foot?

---About ten minutes．

---How did he arrive ______ Beijing?

---______ a train．