这句英语正确吗?

now 不能做主语，要用 it；
measure population 的地道说法是 make census 做人口普查

Now it's possible to make census more accurately.

不正确，

Now it is possible to measure population more accurately

加"it"作为形式主语修饰

Now (IT) is possible to measure population more accurately.
前面没主语了,当然不对咯

错
不是is,应该是it is

现在更加准确地计算人口数量成为了可能.

错
不是is,应该是it's+adj+to do sth