21.
which of these fragments could you correct by adding only a subject?

george washington, president of the convention.

occurred in philadelphia in 1787.

to allow the government to create laws.

the confederation of the united states established in 1781.

The correct answer is B. Occurred in Philadelphia in 1787

Explanation:

In grammar, a fragment refers to a set of words that go together but are not sentences because they do not have a complete meaning, a subject (the entity that carries out the action) or a verb (action of the sentence). Because of this, fragments can usually be corrected or made into sentences by adding a subject, a verb or other type of words to make it complete. Also, the type of information that needs to be added depends on the information that is already included in the fragment. This means a fragment that could be corrected by only adding a subject is a fragment that contains a verb and some information about it that works as a complement but lacks a subject. Considering this, the fragment that you could correct by adding only a subject is "occurred in Philadelphia in 1787" because this fragment contains a verb "occurred" and  a complement "in Philadelphia in 1787", which means by adding only a subject such as "the convention" or "the accident" the fragment would be corrected into a complete sentence.

whether dad arrives in time for the game depends on his conference. subject

now, of course, the quality and the seasonability of these winter dreams varied, but the stuff of them remained.   they persuaded dexter several years later to pass up a business course at the state university—his father, prospering now, would have paid his way—for the precarious advantage of attending an older and more famous university in the east, where he was bothered by his scanty funds. but do not get the impression, because his winter dreams happened to be concerned at first with musings on the rich, that there was anything merely snobbish in the boy. he wanted not association with glittering things and glittering people—he wanted the glittering things themselves. often he reached out for the best without knowing why he wanted it—and sometimes he ran up against the mysterious denials and prohibitions in which life indulges.

there you go thats what we are missing