SAT punctuation practice questions

A worked example

The trial ended; the team reviewed its notes. Each side has a subject and a verb and can stand alone.

A common trap

Words such as however and therefore do not turn a comma splice into a correct sentence.

For a longer walkthrough, read SAT punctuation: a practical guide to sentence boundaries.

By Sentence Practice editorial team · Reviewed 2026-09-05

All 8 questions, with explanations

Work on paper or read at your own pace. Open each explanation after choosing an answer. These are the same original questions used in the interactive tool.

1. 1. The archive had outgrown its original building ____ the city approved funding for an extension. Which choice completes the text according to Standard English conventions?

   1. ;
   2. ,
   3. because of
   4. : and
   Show answer and explanation

   Answer: A. ;

   Both sides can stand alone as complete sentences. A semicolon joins them. A comma alone creates a comma splice; because of requires a noun phrase, not this independent clause.

2. 2. The curator displayed three materials ____ paper, cloth, and wood. Which choice completes the text according to Standard English conventions?

   1. ;
   2. , and
   3. . Which included
   4. :
   Show answer and explanation

   Answer: D. :

   The words before the blank form a complete clause. The list explains three materials, so a colon introduces it. The list itself is not an independent clause for a semicolon.

3. 3. Although the forecast predicted heavy rain ____ the outdoor performance went ahead as planned. Which choice completes the text according to Standard English conventions?

   1. :
   2. .
   3. ,
   4. ;
   Show answer and explanation

   Answer: C. ,

   Although makes the opening clause dependent. A comma separates this introductory dependent clause from the main clause. A semicolon would incorrectly treat both as independent.

4. 4. The first sample was contaminated ____ so the technician collected another. Which choice completes the text according to Standard English conventions?

   1. .
   2. ,
   3. ;
   4. :
   Show answer and explanation

   Answer: B. ,

   So acts as a coordinating conjunction joining two independent clauses here. A comma belongs before it. A semicolon is unnecessary before this coordinating conjunction in the straightforward sentence.

5. 5. The team compared the two designs ____ each used the same amount of material. Which choice completes the text according to Standard English conventions?

   1. ;
   2. ,
   3. and,
   4. : and
   Show answer and explanation

   Answer: A. ;

   The team compared the two designs and each used the same amount of material are independent clauses. A semicolon joins them without a coordinating conjunction.

6. 6. The village library ____ which opened last spring, now hosts a weekly reading group. Which choice completes the text according to Standard English conventions?

   1. ;
   2. :
   3. .
   4. ,
   Show answer and explanation

   Answer: D. ,

   The which clause is supplementary information set off by paired commas. The comma after spring already closes it; the blank must supply the opening comma.

7. 7. The samples collected from the river ____ unusually high levels of sediment. Which choice completes the text according to Standard English conventions?

   1. , contained
   2. ; contained
   3. contained
   4. contained,
   Show answer and explanation

   Answer: C. contained

   The subject is The samples collected from the river and the verb is contained. No punctuation should separate that subject from its verb or that verb from its object.

8. 8. The editor had one request ____ that the author shorten the introduction. Which choice completes the text according to Standard English conventions?

   1. .
   2. :
   3. ;
   4. , and
   Show answer and explanation

   Answer: B. :

   The editor had one request is a complete introductory clause. The that clause explains the request, so a colon works. The explanatory fragment cannot stand alone after a semicolon or period.

Scope reference: College Board’s section overview. Questions are independently authored and are not official exam material.