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.
It’s hard to concentrate when you’re tired.
A.Your being tired makes you unable to concentrate.
B.You’re impossible to concentrate as a result of your being tired.
C.Your tiredness leads to your incapable of concentration.
D.The more tired you are, the harder it is to concentrate.

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