We didn’t want to bother Paul. He was in his room and it looked like he was lost in _______ thought.
Correct Answer: EASY
A. serious (adj): serious, serious
B. great (adj): great, great, great
C. heavy (adj): heavy
D. deep (adj): deep, profound
=> Deep thought: to think deeply
We don’t want to bother Paul. He’s in his room and it looks like he’s deep in thought.