Question 47. He learned to drive when he was eighteen.
The correct option that paraphrases this sentence is: D. He has driven since he was eighteen.
Explanation: This option correctly implies that he started driving at the age of eighteen and has continued to do so.
Question 48. Why don't you use energy-saving bulbs?
The correct suggestion for using energy-saving bulbs is: B. I suggest you should use energy-saving bulbs.
Explanation: This option provides a clear recommendation to use energy-saving bulbs.
Question 49. "If I were you, I would take the job," said my roommate.
The appropriate interpretation of this statement is: B. My roommate advised me to take the job.
Explanation: This option captures the meaning that the roommate is giving advice or a suggestion to take the job.
Question 50. In spite of his hard work, he couldn't finish the job.
The correct conjunction to use in this context is: C. Although he worked hard, he couldn't finish the job.