should "it" be omitted?

[chance22]

In the following sentence: Those students who stay out of school do ___ for different reasons
should I use "it" in the blank or should "it" be omitted? Why? Thank you for explanation.

 

[Raymott]

In the following sentence: Those students who stay out of school do ___ for different reasons
should I use "it" in the blank or should "it" be omitted? Why? Thank you for explanation.

You can use it. I would use so. You can't use the sentence with nothing in the blank.

 

[chance22]

You can use it. I would use so. You can't use the sentence with nothing in the blank.

Thank you very much. So there can be a "it" and "so" in the blank and so is preferable,right?

 

[Rover_KE]

Thank you very much. So there can be [STRIKE]a[/STRIKE] "it" or "so" in the blank space and so is preferable,right?

Yes.