35．-How long ____ you ____ in Singapore?

　-For just the weekend． I’ll be back next Monday morning．

　　 A．have; stayed　　　　 B． are; staying 　　　 C．did; stay　　　　　　　 D．do; stay

34．Jumping out of _______ airplane at ten thousand feet is quite _______ exciting experi­ence．

　　 A．不填; the 　　　　　 B．不填; an　 　　　C．an; an　　 　　　　 D．the; the

33．-Where is Helen?

　 　-She ____ America for a week．

　 　 A．has gone off to 　 B． has left for　　　　 C．has been off to 　 D． has set off to

32．They will leave for Japan _　 __two o’clock this afternoon and we’ll fly to America _　　 _a

　　 few weeks．

　　 A．after; in　 　　　　 B．in; after　 　　　　　 C．on; in　　 　　　　　 D．after; after