单项选择题
A.虽然他是一个慷慨的朋友,但作为一个生意人,他就小气多了。 B.作为朋友,他慷慨大方;但作为生意人,他爱讨价还价。 C.虽然他是一个忠诚的朋友,但作为一个商人,他很狡猾。 D.他是个很大方的朋友,但作为一个商人,他就只做对自己有利的买卖。
A.when she was in the university B.when she began to study in the middle school C.when she was about ten years old D.when she was one of the first America' s women astronauts
A.no one would refuse the chance to fly in space B.someone could give up the chance to fly in space C.no one can get down after going up in space D.someone could have the chance to go down when flying in space