首先,第一句话用 It is not easy to judge people from their appearances.就可以了,如果要加job,就得加a,It is not an easy job...但是完全没有必要.
Because they are not always like what they appears to be.
应该是 ...what they appear to be.
或者就直接说
It is not easy to judge people from their appearances because appearance can be deceiving.