几个初二汉译英……急！！！

我从没去过南京，但我经常去上海
I ( have) (never)(been)(to)Nanjing,but I often go to Shanghai.

也许等我毕业时，我将考虑当一名教师，而不是导游
Maybe when I(graduate),I'll (consider)(working)(as)a teacher,(instead)(of) a tour guide.

我近来很忙，我正着手环游世界
I (have)(been)(busy)these days,I'm getting ready to travel (all)(over)the world.

have never been to
graduate consider to be instead of
am very busy all over

have not been to
graduate prefer to become than becoming
am every busy around
travel around the world环游世界 只有一个空

I ( have) (never)(been)(to)Nanjing,but I often go to Shanghai.
Maybe when I(giaduate),I'll (think)(to)(be)a teacher,(but)(not) a tour guide
I (am)(very)(busy)these days,I'm getting ready to travel (around)the world环游世界只有一个空

很迷离。第一个没有问题，最后一个也基本可以，应该是只有一个空格。
第二题，上上楼的答案没有考虑到那个逗号吧？如无论怎么看，加了逗号再添两个空都怪怪的。