---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