在生态系统的能量流动中，能量形式的转变顺序是[]A．光能→化学能→热能B．热能→光能→化学能C．化学能→光能→热能D．光能→热能→化学能-八年级生物

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• You look too tired. Yourest andwork too much.[ ]A. should; shouldB. shouldn't; shouldn'tC.
• You go and ask Meimei. Sheknow the answer.[ ]A. must, may B. must, stayC. need, can D. can, may-七年级英
• —Whoseisthepencilbox?—It__________beTom's.Lookathisnameonthecover![ ]A.canB.mayC.mustD.need -九年
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• It’s too dark.I ________ go home.[ ]A. canB. have toC. needD. may -七年级英语
• Where is Jack ?Sorry, I don’t know. Go and ask his brother.He _____ know.[ ]A. can B. mayC. mustD. n
• 生态系统中，能量沿着食物链传递、逐级递减。[]-八年级生物
• —_______you speak French?—No, I can’t.[ ]A. Can B. MustC. May D. Should-七年级英语
• —Where is my English book?—__________ it's in your bag or it __________ in your desk.A. Maybe;
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• My sister is ill, and shestay in bed for several days.[ ]A. need B. mustC. has to D. has to be-八年级英语
• -Can he play the guitar?-_____, and he can play it well.[ ]A. Yes, he can.B. No, he can't.C. Ye
• —I have a fever.—You _____ drink lots of water.[ ]A. are B. should C. don't D. shouldn't-八
• Dan_______come to the ceremony tomorrow. I'm not very sure.[ ]A. mayB. mustC. should D. need-九年
• —Can I park my car here?—Sorry ! Youdo it. No parking is allowed here.[ ]A. may not B. don'tC.
• I wish I _____ be a doctor.[ ]A. canB. willC. amD. could-九年级英语
• You_______ buy the TV guide for next week. I have already bought a copy. [ ]A. mustn'tB. needn&
• 改写同义，每空一词。1. How is the weather?____ ____ the weather ____?2. What can I do for you?____I____ you?3.
• 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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• 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
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• Jane _________ to carry heavy things. She is very strong.[ ]A. canB. ableC. is ableD. could-八年级英语
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• 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.
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• MrsSmith________beathomenow.SheflewtoHainanthismorning.[ ]A.mustn'tB.can'tC.maynotD.needn&
• 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
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• Boysandgirls , don'tforget your report. It____ today.[ ]A. can't finishB. can't be fi
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• I'm too tired, so I _______ sit down and rest every five minutes[ ]A. mustB. must toC. have D.
• Tom __ not be murderer(凶手) because I saw he was at other place at that time(在那时).[ ]A. must B. can C
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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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