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【简答题】
Fill in the blanks with the words o phrases given in this unit. Among which ( ) is the main reason for sandstorm frequently occurred in the recent years.
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反馈参考答案：
举一反三
【单选题】－English is too hard for me to study well. I don’t want to learn it any more. －Don’t . It is useful in the future.
A.
give up
B.
give out
C.
give away
D.
give to
【判断题】After writing letters to her friend Doug for two years, Catherine felt at ease meeting face to face with him.
A.
正确
B.
错误
【简答题】五环电阻 470 Ω的色环顺序是黄紫黑()棕。
参考解析：
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