1. the manager has got a good business________so the company is doing well. a.idea¡¡¡¡¡¡¡¡ b.sense¡¡¡¡ c.thought¡¡¡¡ d.thinking2. the collapse of the world trade centre has put us economy in a difficult________. a.occasion b.case c.situation d.background3. more and more people choose to shop in a supermarket as it offers a great ________ of goods. a.variety b.mixture c.extension d.combination4.it won’t make much ________ whether you agree or not.a.difficulty b.trouble c.difference d.matter5.if by chance someone comes to see me, ask him to leave a ________.a.message¡¡ b.letter¡¡ c.sentence¡¡ d.notice6.no one has yet succeeded in explaining the ________ of how life began.a.cause b.problem c.reason d.puzzle7.you must get there within an hour. there should be no ______ in sending this information to him.a.question b.problem c.quarrel