1、Taking all these factors into consideration, we naturally come to the conclusion that... 把所有这些因素加以考虑，我们自然会得出结论……

　　很完全的答法，"take sth into consideration"短语的应用，加分。

　　2、Taking into account all these factors, we may reasonably come to the conclusion that... 考虑所有这些因素，我们可能会得出合理的结论……

　　"Take into account sth"短语似乎又比上句的"take sth into consideration"提升了一个层次。

　　3、Hence/Therefore, we'd better come to the conclusion that... 因此，自然我们得出以下结论。。。

　　"Hence"一词用在文章中大气吧，但别平时口语中用，否则即使老外也用一种看老古董的眼神看你。。。

　　再特意提一句："we'd better"在这里不是“不得不”或“最好”的意思，而是一种自然而然，水到渠成的得出结论。

　　4、There is no doubt that (job-hopping) has its drawbacks as well as merits. 毫无疑问，跳槽有优点也有缺点。

　　短语"there is no doubt that"上线，同时运用我们的老朋友"as well as"增加看点。

　　5、All in all, we cannot live without... But at the same time we must try to find out new ways to cope with the problems that would arise. 总之，我们没有……是无法生活的。但同时，我们必须寻求新的解决办法来对付可能出现的新问题。