The sentence "He'd better have seen a dentist before he lost his tooth” means:
A
. He lost his tooth because he didn't see any dentist
B
He lost his tooth though he saw the dentist.
C
Despite the fact that he saw a dentist frequently, lost his tooth
D
He was advised to see a dentist before he lost his tooth
Correct Answer: He was advised to see a dentist before he lost his tooth