---Why are you still waiting in line?--- I’ve missed my turn ________.
---Who helped you clean the classroom yesterday? ---_______. I did it all by myself.
I remember ______ the math problem ______.But I can’t remember it’s answer.
It’s said that _____ of the water around the world _____ polluted.
---May I have a look at your plan for the robot ? ----Sorry ,I’ve _____ it at home .
----Which of the two pairs of shoes will you take ? ----I’ll take _____ .They are too small for me.