Whether it will do us harm remains_______ .
—She looks very happy. She________have passed the exam.—I guess so. It's not difficult after all.
Don't be so anxious about that. Helen________a note.
—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.