以下是我国生态农业的例子。资料一：广东利用赤眼蜂防治稻纵卷叶螟，取得了良好的效果。在华北地区利用杉毛虫、显眼蜂防治玉米螟，可以代替农药。资料二：在我国很多农村，沼气-八年级生物

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• That man ______ be my English teacher. He has gone to Canada.[ ]A. needn’tB. mustn’tC. can’t-九年级英语
• —What's wrong with you? You looked tired.—Last night I _____ sleep well.[ ]A.couldn'tB.wou
• 从方框中选择适当的情态动词，并用其正确形式填空。can, must1. _____ you see those people over there?2. You _____ play fire, be
• Our manager is out. _____ I take a message? [ ]A. Can B. Should C. MustD. Do-八年级英语
• “螳螂捕蝉，黄雀在后”，形容人们做事时常常顾此失彼。我国内蒙古自治区东乌旗牧区，“草肥水美”。牧民们世代在这里居住和放牧。在1960年以前的草原上还生存有狐狸、狼、野驴等-八年级生物
• Jane _________ to carry heavy things. She is very strong.[ ]A. canB. ableC. is ableD. could-八年级英语
• Ads sometimes help people learn more about new products, but at other times ads _______tell lies. [
• —What can Tony do? —He can __ the guitar. [ ]A. is playing B. playing C. plays D. play-七年级英语
• I certainly wondered what my parents _____.[ ]A. are doingB. will do C. wouldD. have done-九年级英语
• __ I get home before 7 ?no, you needn’t.[ ]A.Must B.Should C.Can D. Will-八年级英语
• All of them thought we _________ finish so much work in one day. It was too hard for us.[ ]A. canB.
• 句型转换，每空一词。1. Hello ! I'd like to speak to John.(疑问句) Hi! ___ I__to John?2. Hi! Is Wang Hua at h
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• You ________ go and help him with the housework.[ ]A. don't needB. not needC. needn't toD.
• —Must I take the medicine every day?—No, you______.[ ]A. must not B. may not C. haven’t D. needn
• The front road was washed away, so we _____ get off the bus and walk over. [ ]A. must B. had toC. sh
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• When the traffic lights are red, we _______ stop.[ ]A. should B. might C. mustD. may-八年级英语
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• They _______ put off the football game because of the rain yesterday. [ ]A. had to B. mustC. could D
• —May we leave the classroom now?—No , you____.You____to leave until the bell rings.[ ]A. mustn'
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