题目内容
5．Now Chinese teenagers have plenty of chancesto take part in/to join in all kinds of outdoor activities．（参加）分析 现在中国青少年有大量参加各种各样户外运动的机会．
解答 答案：to take part in/to join in
根据汉语提示"参加"及句中的关键词outdoor activities"户外运动"，又知"参加"各种活动，如庆祝会、劳动、体育等活动需用动词短语take part in 或join in，结合句型结构可知该动词短语在句中作定语修饰前面的名词chances，故用动词不定式形式，故答案为to take part in/to join in
点评 本题属于给汉语型单词拼写题，首先根据汉语提示及句中的关键词确定该单词，再注意该单词在句中的句法功能，从而填写适当的词形．本题考查动词短语take part in，join in 以及在句中作定语的用法，故用动词不定式形式．
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