Multiple choice Directions: Identify the part having an error. If no part has an error, mark (5). Engines used in space shuttles are much larger and more strong than the ones used in jet planes No error Reveal answer Fill a bubble to check yourself C Correct answer Explanation Strong is a one-syllable adjective, so its comparative form is stronger, not more strong. The rule is: short adjectives take -er suffix (stronger, faster, taller), while longer adjectives use more before them (more expensive, more beautiful).