17.A) He enjoyed teaching English.
    B) He wanted to earn more to support his family.
    C) The owner of the school promised his a good position.
    D) He could earn more as a teacher than as a travel agent.
    Passage Three
    Questions 18 to 20 are based on the passage you have just heard.
    18.A) It can be cooked in many ways.
    B) It is delicious but inexpensive.
    C) It gives higher yields than other grain crops.
    D) It grows easily in various conditions.
    19.A) Fried potatoes B) Tomato juice.
    C) Sweet corn D) Chocolate beans.
    20.A) They led to the discovery of America.
    B) They made native American foods popular.
    C) They brought great wealth to Spain.
    D) They made native American life styles wellknown.