His sister had become a teacher , ______ was what he wanted to be.
--Hi, Betty. Shall we go swimming this Sunday? --This Sunday? I am sorry, I have a lot of homework ____ this Sunday.
Although Jeff loves KFC, he tries ____ it too often.
Who do you think you’d like ____?
When you leave, don’t forget ____ off the light.
It ____ Jack twenty minutes ____ the math problem yesterday.