1 have been+现在分词 和has been +现在分词 这两个在用法上的区别（举例说明）
2 He is _C__a wirter as areporter
A more B rather C not so much D not much(请说下A B D的错误之处）
3 Orlando ,a city in Florida _B__for its main attraction ,magic kingdom (此句是说Orlando因魔术玩过而闻名吗.同样也说下各个选项的含义 为什么选择B
A whivh is well known B is well know C well known D being well known