根据句意及首字母提示在横线处填写上恰当的单词，使句子意思完整。语法正确。
1. Don't be w______ about your English study.
2. It is a private question. I r______ to answer it.
3. The conductor can o______ you something to drink and eat on the train.
4. The teacher w __ that these problems might be too hard for her students.
5. You can't take photos here without p ___
6. The r __ of the eggs have gone bad. Please go and buy some.