Will you please _________ them _________ a writing competition?
My mother_______ if she ________her work this week.
.---My brother fell off his bike and hurt himself. --- .
Environment(环境) is very________,but you don’t understand the_______ of it,you always drop litter everywhere.
He spent as much money as he could _______ a new iphone6.
The teacher told me _________when I left the classroom.