1. （只要看一眼這封信） ____________ ， will convince you that you have been taken in.
    2. Please don’t stand in the kitchen, you’re________________ （擋路了） .
    3. ________ （如果暴露在空氣中） , iron will react with the oxygen of the air.
    4. ________ （對聽到的事情感到震驚） , he placed both his hands on his mouth.
    5. We’d better struggle for the future ________ （而不是為過去而懊悔） .
    答案：
    1.A glance at this letter
    2. in the way
    3. If exposed to the air
    4. Shocked at what he had heard
    5. rather than regret for the past.