(A) AFTER GEORGE (B) HAD RETURNED (C) TO HIS HOUSE, HE (D) WAS REA...

27. - BAI TAP TRAC NGHIEM TIENG ANH 12
BAI TAP TRAC NGHIEM TIENG ANH 12
27. (A) After George (B) had returned (C) to his house, he (D) was reading a book;