--- ____ busy schoolwork, the children also have to take arts, music and sports classes in their free time. --- I wonder what they will become.
She is _______ at her boyfriend.
He looks forwards every afternoon to _____ the flower-lined garden.
His face looks brown because he works ____ all day.
I'm not sure whether this is the room ________ she left her dictionary.
---Don't put the waste on the ground. ---Oh, I'm very sorry. I ________ the dustbin(垃圾箱) there.