---We've lived here ______ 1980.

---So you've lived here _____ about twenty years.

---How long ______ you ______ a bad cold?

---Since last week.

---Be careful ,________you will make mistakes in your exams.

---I know that，Mum. One can never be too careful.

---How can I wake up so early?

---Set the alarm clock, ______ you will make it.

---I'm going to an amusement park.

---______．

---Meimei could read books when she was only three years old.

---______.

---What did Mary have ______ breakfast this morning?

---She was late for school and hurried off ______ breakfast

---I can’t walk any longer, Mum.

---Why?______?

---I want to know when ______have a field trip．

---We’ll have it when all the work