20．The new bridge is _____ the one built last year.

　 　A．three times as wider as　　　　　　　 B．three times the width of

　 　C．three times the width　　　　　　　　 D．as three times as

19．If you are found _____ in the schoolyard, you _____ by the teachers.

　 　A．smoking; are blamed　　　　　　　 B．smoke; are punished

　 　C．smoking; are to blame　　　　　　　 D．smoking; are to punish

18．There is nothing for us to do but _______ the injured man to hospital.

　 　A．taking　　　　 B．being taken　　　　 C．took　　　　 D．take