Darwin’s theory of evolution remains ____partly because it challenges the religious belief that God created man.
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I had to ____one of my email accounts as it was filled with junk mail.
You can often come up with a(n) ____to a problem by looking at it from a different angle or thinking about it in another way.
A country's future ____depends, to a degree, upon the quality of education of its people.
He was ____with his business matters and didn't have time to think about holiday.