職稱英語綜合類完形填空練習(xí)題9(5)

12. A) him
    B) his
    C) them
    D) theirs
    13. A) on
    B) to
    C) in
    D) with
    14. A) to heat with
    B) to heat it by
    C) by heating it with
    D) by heating with
    15. A) was used
    B) had used
    C) had been used
    D) was being used
    KEY: BABDC BACCD ABBCC