– I ran 10 miles last weekend. Can you believe that?
– Wow, that ______ easy!
A.mustn' t be | B.mustn't have been |
C.can't have been | D.couldn’t be |
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– I ran 10 miles last weekend. Can you believe that?
– Wow, that ______ easy!
A.mustn' t be | B.mustn't have been |
C.can't have been | D.couldn’t be |