Exercise 3 ( 中 ) 1 . What amazes me is how long she managed to hide it from us. 2 . It amazed her that he could be so calm at such a time. 3 . We had an argument with the waiter about the bill. 4 . Can you believe that I bought a TV for $25? 5 . Stop being a couch potato you don't get much exercise sitting there all day like this. 6 . A stroll after each meal keep the doctor away. 7 . It was something that happens once in the blue moon. 8 . There is nobody by that name working here. 9 . Why die she marry a man old enough to be her father ? 10 . You don’t seem to be quite yourself today.