The phrase "adds to questions" is correct and usable in written English.
It can be used when discussing how something contributes to or increases the number of questions or inquiries about a topic.
Example: "The new evidence adds to questions regarding the validity of the previous findings."
Alternatives: "raises questions" or "increases inquiries".
But it adds to questions among some tech companies and lawmakers about how much the administration, and the task force in particular, are doing to protect future elections from Russian meddling.
The filing adds to questions and concerns about the program just as the first potential beneficiaries reach the end of their 10-year commitment — and the clocks start ticking on the remainder of their debts.
But the discrepancy in the warnings adds to questions about whether more could have been done to get people out of harm's way before the mudslides swallowed homes and buried residents.
While this is positive from a universal coverage perspective, it does present challenges for sustainability (discussed below), and also adds to questions of the extent to which the NHIS is a contributions-based insurance model (Table 3).
The complaints have not been verified, but they add to questions about whether Toyota's big recalls will resolve its problems with unexpected acceleration.
The military's defence that it had fired four tank shells to disperse the crowd only added to questions about its actions.
His initial decision to skip his first meeting with Nato foreign ministers had added to questions about the Trump administration's commitment.
The potential for prices to fall as low as this is becoming greater, they said, adding to questions around the viability of expensive projects like Goliat.
The fallout from the reports added to questions Facebook was already confronting over the use of its platform by those seeking to spread Russian propaganda and fake news.
