If we go on using energy so wastefully , are that our oil wells will be dried up before new energy sources can be found to replace oil .
__________ the plan many times, but he still didn’t understand.
When he got home, he found the door _____, the window ______, the money and the necklace in the drawer _____.
_______ of my classmates could work out the maths problem because it was too difficult.
________ is where he gets all his money from.
He kept looking at her, wondering whether he _____ her somewhere.