题目内容

根据句意或首字母填入所缺单词。
1.  Cars arc s______ than bikes.  And they are also f______ than bikes and buscs.
2.  He can run very f______.
3.  Don't worry! This place is very s______.
4.  There are too many p______ at the train station every day.
5.  When you are in d______, please keep calm.
1. safer, faster 2. fast  3. safe
4. passengers 5. danger
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