Spell a lot as two words, not one. In formal writing (such as essays and exams), avoid a lot in favor of much or many.
Examples:
- A lot of students finished the exam early. (informal)
- Many students finished the exam early. (formal)
Practice:
(a) Professor Legree received _____ of complaints. (informal)
(b) Professor Legree received _____ complaints. (formal)
