168. John said that his brother _____ at home then.
A. is B. was
C. were D. has been
then -> chuy n t now -> câu tr c ti p thì hi n t i ti p di n "be" không chia ti p di n ->
hi n t i đ n -> lùi thì v quá kh đ n -> ch n "was" vì nó phù h p v i "his brother"
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