I'd rather use plural ('Are apples and oranges considered healthy') and I would also leave out 'enough'? Why? Because you're not talking about one orange or one apple, but generally talking about these two kinds of fruit...
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BellyBut are "as well as" and "and" equivalent?Dear Belly,
BellyThanks Hoa Thai for useful information, but Micheal Swan wrote in his book:Dear Belly,
Note the difference between:
She sings as well as playing the piano (= She not only plays, but also sings)
She sings as well as she plays the piano (= Her singing is as good as her playing)