Question 108·Hard·Boundaries
Dr. Chen's study revealed significant improvements among _____ the findings still need to be replicated in a larger trial.
Which choice completes the text so that it conforms to the conventions of Standard English?
For punctuation and sentence-boundary questions, first decide if the parts of the sentence around the underlined portion are independent clauses (complete sentences). If both sides are complete, rule out options that use only a comma or no punctuation between them, since those create comma splices or run-ons. Next, recognize when a word like however is a conjunctive adverb joining two sentences; in that case, look for the standard patterns such as "clause; however, clause" or "clause. However, clause." Use this structure-based approach rather than reading for sound alone to avoid being tricked by options that sound okay but are grammatically wrong.
Hints
Check if both sides of the blank are complete sentences
Cover the blank and read the words before it as one unit, and the words after it as another unit. Ask: can each side stand alone as a complete sentence?
Think about how to connect two independent clauses
When two complete sentences are joined in one line, do you usually use just a comma, no punctuation, or something stronger like a semicolon or period?
Focus on how the transition functions here
Notice that the options include the contrasting transition "however." When a conjunctive adverb connects two full sentences midline, what punctuation normally appears immediately before and after it?
Eliminate options that create a run-on or comma splice
Try reading the sentence with each choice. Which options make the sentence feel like two sentences squished together with weak or missing punctuation?
Step-by-step Explanation
Identify the structure of the sentence
Read the full sentence with a blank:
"Dr. Chen's study revealed significant improvements among _____ the findings still need to be replicated in a larger trial."
Check each side around the break:
- Left side (once completed with a noun): "Dr. Chen's study revealed significant improvements among patients" is a complete sentence (independent clause).
- Right side: "the findings still need to be replicated in a larger trial" is also a complete sentence (independent clause).
So you are joining two independent clauses with a transition word (however).
Recall the rule for joining two sentences with a conjunctive adverb
Words like however, therefore, moreover, and consequently are called conjunctive adverbs.
When they connect two independent clauses in one sentence, the usual pattern is:
- first independent clause
- strong punctuation (such as a semicolon)
- conjunctive adverb
- comma
- second independent clause
So you are looking for an option that gives you strong punctuation before the transition and a comma after it.
Test each punctuation choice against the rule
Insert each option and see if it correctly joins two independent clauses.
- "patients however" gives: "...among patients however the findings..." — this lacks strong punctuation between the two sentences and does not set off however with a comma.
- "patients, however" gives: "...among patients, however the findings..." — a comma alone is too weak to join two independent clauses, and there is no comma after however.
- "patients: however" gives: "...among patients: however the findings..." — a colon is not used this way with however, and again there is no comma after however.
Only one option both separates the clauses correctly and punctuates however properly.
Choose the option that matches the correct pattern
The correct structure should be:
- first independent clause;
- however,
- second independent clause.
Choosing "patients; however," produces:
"Dr. Chen's study revealed significant improvements among patients; however, the findings still need to be replicated in a larger trial."
This correctly joins two independent clauses with a semicolon before however and a comma after it.