—May I go outside and play for a while, Dad?—No, you can’t ____ your homework is being done.
Let’s make contributions to_________world of the 21st century, _________world of success and understanding each other.
—Where can we spend our summer vacations this month? —Oh, _______ of the coastal cities will do if it agrees with you.
Behind the teaching buildings ______ a big lake surrounded by trees and flowers.
—Do you mind if I close the window?— ________. We should let in more fresh air.
—Mum, I got the Teddy Bear from the top of the shelf. —My goodness! You _____ yourself. You ____ do that next time.