Our teachers took us on （ ） to observe plants and animals. ( 章节：2 难度：4)
- A、trips to the farm
- B、trips to the zoo
- C、field trips
- D、trips in real, natural environment
正确答案:C
答案解析:有
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Our teachers took us on （ ） to observe plants and animals. ( 章节：2 难度：4)
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