These two books are very interesting. You can choose _________ of them.
—Mum, I climbed to get the Teddy Bear from the top of the shelf.—My goodness! You________yourself. You________do that next time.
Sorry, I'm late. I________have turned off the alarm clock and gone back to sleep again.
I posted a book to her three weeks ago. She________have received it.
She________have been to your house. She doesn't know your address.
—I'm sorry, Mrs Smith. I've broken your glasses.—It doesn't matter, Marks, but you________careful.