The professor was known for his lectures, which put even the most attentive students to sleep.

  1. energetic
  2. riveting
  3. stimulating
  4. soporific
Answer

D) soporific

Soporific = causing sleep. Advanced Verbal (GRE, GMAT, SAT) · Text completion

English MCQ · More English: Advanced Verbal (GRE, GMAT, SAT) MCQs · Practise