20．The Hotel Al Arab ______ the first and only 7-star hotel in the world was designed in the shape of a 　　 sail of 321 meters.

　　 A．was considered　　 B．considering 　　　 C．being considered　 D．considered

19．A study shows that students living in non-smoking dormitories are less likely to ________ the habit 　　 of smoking. 　　A. pick up 　　　　B. turn up　　 　　　　C. draw up　 　　　　　　　　　　　 D. make up

18．As we all know, ______ medical examination will help us find out health problems as early as possible.　　 A.　common　　 　　 　 　B. general　　　 　　 　　　 C. regular　　 　　　　　　　 D. normal　

17．Since the beginning of the vacation，I　　　　 across the country，and my next stop is the Wuyi　 Mountains．

　　 A．had traveled　　 　 　B．will travel　　　　　 C．have been traveling　　 D．was traveling

16．Once again he didn’t hand in his homework _____ he had been given enough time to do it．

　　　 A．in case　　 　　　 B．as though　 　　　 C．so that　　 　　　　 D．even though

15．---They live on a busy road．　　 --- There ______ be a lot of noise from the traffic．

　　　 A．must　　 　　　　　 B．may　　　 　　　　 C．would　　 　　　　 D．could

14．_____ the chapter four times, I finally understood the author's theory．

　　　 A．Reading　　 　　　　 B．Having read　 　　　 C．To read　 　　　　　 D．Read