IT WAS ONLY BECAUSE HIS WIFE HELPED HIM THAT HE WAS ABLE TO FINISH...

78.It was only because his wife helped him that he was able to finish his book.

A.Without his wife’s help, he couldn’t have finished his book.

B.His wife was able to finish the book with his help.

C.If only he had been able to finish his book.

D.If his wife helped him, he would be able to finish his book.