Mark the letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.
I’m sure that they had practised hard for the games as they won a lot of medals.
A.They couldn’t have practised hard for the games as they won a lot of medals.
B.They must have practised hard for the games as they won a lot of medals.
C.They shouldn’t have practised hard for the games as they won a lot of medals.
D.They might have practised hard for the games as they won a lot of medals.