选择正确的单词，将正确答案的序号写在横线上。
| A. recycle B. factory C. During D. yourself E. wood F. match |
1．The black smoke from the
_______ makes the air dirty.
2．People bring their
_______ bags to the supermarket.
3．Please write back soon and tell me about
_______.
4．
_______ the winter holiday. Peter went to the UK.
5．The girl used the last
_______ to make the fire.
6．We use
_______ to make paper.
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