The phrase "It mostly comes" is a valid and usable phrase in written English.
You might use it to describe something that generally happens or is generally the case: "It mostly comes down to personal preference when selecting a vacation destination."
It mostly comes down to the personal preference of the growers and winemakers.
"[Lindzen] says it mostly comes down to the money to the incentive structure of academic research funded by government grants.
It mostly comes courtesy of Head Doll Nicole Scherzinger, a Teri Hatcher lookalike with a waist that could slip into a bracelet.
For Tucker, though, it mostly comes down to his ball toy, which he plays with in exuberant, wild abandon, tossing it into the air and staging crouched bouts of tug of war with Ms. Seely.
It mostly comes in the form of bitumen, which is "hard as a hockey puck" at 10°C, as the Canadian Association of Petroleum Producers CAPPP), an industry body, puts it.
"These are premium, organic, local or regional products," said Leberquier. "The south of France used to produce 400 tonnes of linden a year; now it mostly comes from Latin America and the harvest here is barely 15 tonnes a year.
The small growth had to come from somewhere and where it mostly came from was exports.
In the 20th century it mostly came to be regarded like graffiti: something polite and respectful people did not do.
Regular followers of the New York choral and early-music scenes knew what to expect from those excellent ensembles, and it mostly came to pass.
Mr. Obama got applause then in urging Congress to pass legislation mitigating the problems he foresaw, but it mostly came from Democrats.
As recently as ten years ago, scientists thought that while Mars had some water it mostly came forth sporadically, and did not cover much of the planet.
