3．
(1) This is a room filled of all sorts of books .
(2) The reason why I was late was because I got up late .
(3) A city was set up in which used to be a wasteland .
(4) Shanghai is larger than any other cities in China .
(5) You had better not go to work .It’s better have a rest .
(6) Even if the country was rich , there were existed people suffering from hunger .
(7) Laying eggs are her full-time job .
(8) --- How was the test ? --- Oh , pretty hard . I was quite puzzling .