The achievements we have made are largely ___ the hard work of our parents and teachers.
_____ time, he’ll make a fist-class tennis player.
The picture ________ on the wall is painted by my nephew.
The managers discussed the plan that they would like to see _______the next year.
how to do the homework, I went to ask my teacher for help.
You’d better leave the windows _________ and the door ___________.