The phrase "the challenges become" is correct and usable in written English
You can use it when discussing how challenges evolve or change over time in a particular context.
Example: "As the project progresses, the challenges become more complex and require innovative solutions."
Alternatives: "the challenges transform" or "the challenges evolve."
When the challenges become evident, misery is the result.
The rules aren't new, but inevitably it is only when people come to renew passports that the challenges become apparent.
The challenges become even more heart-rending after middle school, when the children of migrants must either return to their parents' hometown for high school — and thus live separated from their parents — or drop out.
By packaging a combination of products, services, ISVs and consultants, Box is acknowledging that the deeper it goes into the enterprise, the more difficult the challenges become.
The challenges become more complex when N and S atoms in particular are present as these atoms can exist in multiple valence states and thus increase the number of potential candidates to be considered [1]. Figure 21 relates the distribution of the molecular weights across the frequency of each challenge.
Again, the challenge will be for leaders in public and private sectors to demonstrate how they are part of the solution, not the problem, We need to remind ourselves that as the challenges become clearer so do the opportunities and that as the coalitions form and so the commitment to doing what is possible grows.
But over time, the challenges became lessons.
The longer old Top Gear carried on, the less inspiring the challenges became, which is inevitable when so many ideas have to be generated.
Those who fall to the side and do not step up to the challenge become just that: outliers.
The challenge becomes between you and yourself.
The challenge became to find an image of Jane Grey.
