【推荐1】Can you give me a case ________the three words honesty, sincerity and bravery are used? （用适当的词填空）

【推荐2】阅读下面材料，在空白处填入适当的内容或括号内单词的正确形式。
1. Everyone should work hard and do what they can ____________(fight) against national smog.
2. ____________(observe) the problem for many years, he announced that we are facing the severe environmental problem of our time.
3. We should produce more things from materials that have been recycled, and less from raw materials, the supply of ____________ is growing smaller and smaller.
4. He travelled on the plane like this, keeping the tortoise ____________ (hide) in a blanket.
5. I remember ____________ (invite) to their party, but I have forgotten the invitation in the office.
6. I told Hannah my secret and ____________ (admit) how badly I had done in the math quiz.
7. David has done good deeds all his life, ____________ (earn) him much reputation.
8. They started shouting at each other and it turned into a horrible ____________ (argue).
9. ____________ it may feel awkward, if she really is your best friend, you should apologize for blaming her.
10. We need to stop thinking of companies and businessmen ____________the enemy and give them more credit.

【推荐3】After the flooding, people were suffering in that area, ________ urgently needed clean water and medicine.
After the flooding, people were suffering in that area, ________ clean water and medicine were needed. （用适当的词填空）