Word choice questions test whether you can select the most precise and appropriate word. Idiom questions test standard English expressions.
Commonly Confused Words
| Word | Meaning |
|---|---|
| affect/effect | affect = verb; effect = noun (usually) |
| then/than | then = time; than = comparison |
| fewer/less | fewer = countable; less = uncountable |
| who's/whose | who's = who is; whose = possessive |
| accept/except | accept = receive; except = exclude |
| complement/compliment | complement = complete; compliment = praise |
Common Idioms
- Different from (not "different than")
- Capable of (not "capable to")
- Interested in (not "interested with")
- Responsible for (not "responsible of")
- Attribute to (not "attribute with")
Precision
Choose the word that most exactly fits the context.
"The scientist studied the cells" vs. "The scientist analysed the cells" — "analysed" is more precise for detailed examination.
ACT Tips
- If two answers are grammatically correct, choose the more precise one.
- Trust your ear for idioms — the standard phrasing will "sound right."
- When in doubt, the simpler word is often better.
Practice Problems
- "The results had a significant (affect/effect) on the study."
- "She is very different (from/than) her sister."
- "The team had (fewer/less) victories this season."
Want to check your answers and get step-by-step solutions?
Key Takeaways
Learn the commonly confused word pairs.
Idioms use specific prepositions — there's no rule, just memorize.
Choose the most precise word for the context.