You _______ walk across the road. It’s dangerous.[ ]A. may notB. don’t have toC. must notD. needn’t-

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• 下面是某生物小组的“探究生态系统中动植物的数量关系”研究性课题的有关实验过程，请分析并回答问题．实验用具及材料：小虾、蚂蝗、水草、洗净的沙子、池水、有盖玻璃瓶．说明：4-生物
• Another popular idea is that the Stonehenge_ a kind of calendar. [ ]A. must be B. can't beC. mi
• Tony said that Lily _____ the pages of your diary.[ ]A. numberB. are numbering C. should number D. n
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• —Can you give me a hand, Robin?—But, Helen, you ____ my help every five minutes. I ___ TV now.[ ]A.
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• —This winter H1Nl has become very popular in our country. —Don't worry, itby our government.[ ]
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• 古书《说苑．正谏》中有这样一段记载：“园中有树，其上有蝉，蝉高居悲呜，饮露，不知螳螂在其后也；螳螂委身曲附欲取蝉，而不知黄雀在其傍也；……”这是比喻社会现象的寓言，但却反-八年级生物
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