-What a beautiful river and breathtaking mountains!-Yeah. They make me think I___on an alien planet.
–Sorry, Professor Smith. I didn’t finish the assignment yesterday. --Oh, you _____ have done it as yesterday was the deadline. A. must B, mustn’t C, should D. shouldn’t
I can’t send her an invitation. I wish I _______ her new address.
Although it is _____ to watch programs on TV sometimes, I think people shouldn’t spend all the time watching it.
—Were you surprised by the ending of the film? ----No. I ______the book, so I already knew the story.
While cleaning the room yesterday, I _______ an old photo of my mother.