Sentence:  About all that <WSD>remains</WSD> to be said is that the present selection , most of which appeared first in The New Yorker , comprises ( as usual ) a slightly unstrung necklace , held together by little more than a slender thread cunningly inserted in the spine of the book . 
Meaning of the word marked with <WSD> tags:  be left; of persons, questions, problems, results, evidence, etc.