【单选题】【消耗次数：1】
2. The cause of ______ disease is the economic and educational backwardness of the country.
①
long
②
infectious
③
bad
④
boring
参考答案：
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clear
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clean
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阅读课文II. Television and Children,判断正误2. Television companies show only educational programs for children.
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要想享受淘宝网免费的网上交易服务，并且在超人气的社区尽情交流网上购物经验，就必须先（ ）
①
打开淘宝网页
②
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