2. 职称英语
  3. Every morning, when I drive past the street corner, I can always see the big

Every morning, when I drive past the street corner, I can always see the big

游客2024-01-24  72
问题     Every morning, when I drive past the street corner, I can always see the big sign standing outside the gas station. The sign lists the price of gasoline per gallon. However, in the past few months, the number never seemed to【B1】______. My family, school mates and co-workers have all been complaining about this【B2】______ issue.
    The car is one of the most【B3】______means of transportation in southern California; people even say, "We can not live without cars! "
    According to scientific predictions, we will【B4】______ gasoline in 50 years. People will not be able to drive cars, take planes or even sail ships. When the time comes, hardly anything will【B5】______ normally.
    In this case, governments will have to provide【B6】______ to research departments to develop new forms of energy on which cars can run.
    One idea, for example, is that people in California will be able to drive solar-powered cars since it is【B7】______ sunny most of the time.
    In other states, there are people developing new forms of fuel involving alcohol【B8】______ gasoline or new combinations like gasoline plus corn oil.
    Who knows what forms of new energy people will be using in the future? Without problems 【B9】______, there will be no new solutions. Society needs to move forward. Sometimes, we need these【B10】______ to motivate us to achieve great things. [br] 【B10】
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解析 根据空格前的指示代词these可知，此空需要可数名词的复数形式。challenge“挑战”，其复数形式词尾直接加-s。
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