题目内容
16．A．Canada B．India C．Australia．分析 略
解答 B
点评 略
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6．
| What problem does the speaker talk about？ | （16）pollution |
| In which year was the Earth day started？ | （17）1970 |
| What kinds of pollution are talked about？ | Water，air and（18）noisepollution． |
| What does the speaker think of the Earth Day？ | The most （19）helpfulfestival |
| What advice does the speaker give to protect the earth？ | Plant trees，clean up the city （20）parks， and pick up litter． |