Nobody can achieve anything of real significance _____ he works very hard

Surprisingly, he could draw such a beautiful picture with his eyes _____.

What do you think of the bottled water? –I don’t like it at allIt is reported that much nutrition, including some minerals, _____ while it is being processed

Are you taller than your cousin, Mike—No, I am as ______ as him.

Smoking is bad for your health. —Yes, I know. But I simply can’t ___.