A thousand words will not leave so deep an ________ as one deed.

When he picked up a large sum of money by accident, he battled with his _____ whether he should keep it or return it to the owner.

_______ is known to us all that the old scientist, for _______ life was hard in the past, still works hard in his eighties. 

Yolanda went through the test paper once more carefully for fear that she would _______ any essential details.

While intelligent people can often ______ the complex, a fool is more likely to complicate the simple.