下面是进行探究活动要遵循的一般步骤，按照先后顺序排列正确的是①实施计划②作出假设③制定计划④得出结论⑤提出问题⑥表达和交流。A．⑤②③①④⑥B．①③④⑤②⑥C．⑤④③②①⑥D．②③④①⑤⑥-七年级生物

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• 动物与人们的生活息息相关，既有有利的一面，也有有害的一面。苍蝇、老鼠人见人厌，你能发现它们有利的一面吗?-八年级生物
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• —I forget ______ the window when I left. —It doesn’t matter. Let me help you. [ ]A. close B. closing
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• The doctor told the boytoo much junk food because he is really fat.[ ]A. don’t eatB. not to eat C. e
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• He was too old ___ by himself.[ ]A. walk B. walking C. to walk D. not to walk-八年级英语
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• He chose__ a red shirt, because she likes red.[ ]A. to buyB. buyC. buyingD. bought-八年级英语
• That is all they can do _____ the poor students in that village school. [ ]A. help B. to help C. hel
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• —What would you like ______? —Maybe stamps. They ______ beautiful.[ ]A. to collect; lookB. to collec
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• Don't forget_______ your new MP4 to school tomorrow. [ ]A. bringB. to bring C. takeD. to take-八
• I'm glad _____ the news. [ ]A. hear B. to hear C. hearingD. hears -八年级英语
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• I'm hungry now. Let's stop _____.[ ]A. having a meal B. having a restC. to have a mealD. t
• I think it'll be a good way _____ to the theatre.[ ]A. by bus B. on a bus C. take a bus D. to t
• It is our duty_our hometown clean and beautiful. We must do something for it.[ ]A. to keepB. keepsC.
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• Her parents are strict with her and they don't allow her __ out late. [ ]A. stayB. stayedC. sta