1 . I could see a group of around 20 Brazilian dancers and a band in fancy costumes standing in the street, some of __________ carried flags, which blew in the wind. (用适当的词填空)

2 . Monrovia is filled with hundreds of thousands of refugees (难民), many of ________are hungry and homeless. (用适当的词填空)

3 . The fire has also left dozens of people injured, 5 of ________ are in a critical condition. (用适当的词填空)

4 . In his small house, there is a bookshelf, ________ the top is filled with poetry books. （用适当的词填空）

5 . Many young people, most of ________ were well-educated, headed for the countryside to chase their dreams. （用适当的词填空）

6 . The factory produces half a million pairs of shoes every year, ________ 80% are sold abroad. （用适当的词填空）

7 . Mary invited 30 people to her wedding, most of ___________ are family members. （用适当的单词填空）

8 . 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.