He _________ his bike so he has to walk there.A. lost B. has lost C. had lost
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.
—What about playing football this afternoon, Sam? —I would rather at home than football. It’s too hot outside.
The cleaners make a great contribution to _____ the city clean.