The word your looking for is (It's). It's is a contraction of "it is" and should be used where a sentence would normally read "it is." An absence of contractions and other such signs of TPE, otherwise known as "Too Perfect English", are usually caused by one of/or two things happening. Either both author and editor are non-native speakers of the language used in the story and don't understand American vernacular, or it's the copy/paste result of a direct machine translation from the language the author originally wrote the story in sans an editor that's a native speaker. Neither are good things when it comes to American readers by the way.
But all of a sudden his phone started ringing, hearing which he sighed and said, "Probably it's mom who is not able to find the T.V. remote. Well back to the duty boy."
Anime & Comics · overloaded_maxima
This reads like someone wrote a novel in Chinese then fed it through Google Translate and posted what came out.
ch 0 1 IT'S ANIME!!!
Anime & Comics · overloaded_maxima
You need an editor. Badly. This was awful.
ch 0 8 A father
Anime & Comics · ImagineMaker
A native-speaking English editor. You need one.
ch 0 1 Chapter 1: What?!
Anime & Comics · LordPhenex026
Then why the **** is it there?
ch 0 1 Read the lastest chapter.
Video Games · So_Aap_Jay
Story padding? Really? You'd think one of the "Big Ranking" stories wouldn't need that....
ch 0 1 Ignore this
Naruto: Sakura's Symbiote [Rewrite]
Anime & Comics · PrincessThrone