Unit 2 words

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Across
  1. 3. a very difficult problem
  2. 4. 破损的
  3. 6. 兴趣
  4. 7. 标志
  5. 8. the same meaning as"trip/travel"
Down
  1. 1. n.志愿者 v.只愿做……
  2. 2. the same meaning as"happiness"
  3. 3. a person can't hear anything
  4. 4. a person can see't anything
  5. 5. 信件