用所给词的适当形式填空。1. You(can) try to do it.2. He spent one hour (do) his homework.3. I saw her(play) when

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• —The room is so dirty. _____ we clean it? '—Of course.[ ]A. Let'sB. Would C. DoD. Shall-七年
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• 当食草动物摄取食物时，植物体内的能量就会全部流入动物体内。[]-八年级生物
• Your mother looks a bit disappointed. You have told her the truth. [ ]A. doB. must C. can D. want-九年
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• Mr. Green ______ speak a little Chinese, but he can't speak any Japanese.[ ]A. can B. may C. mu
• 某湖泊生态系统中，湖水中的DDT相对浓度为0.5×10-6，现发现各生物体内均有不同浓度的DDT，检测结果如下：检测对象ABCDEDDT浓度/×10-60.0052.00.575.50.04（1）5种
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• —You fly the kites very well.—Thank you. I________ kites when I was 7 years old.[ ]A. can flewB. cou
• It's raining hard outside, so they stay in the classroom.[ ]A. must B. can C. have to D. might-
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• —Can you come to Susan's party? —Sorry. I ________ look after my grandma.[ ]A. amB. have to C.
• -Must we clean the classroom now?-No, you _____.[ ]A. mustB. needn'tC. aren'tD. must not-八
• -Listen! Is that Kate playing the piano inthe room?-No. It _____be Kate. She has gone to London.[ ]A
• I _______ like some noodles.[ ]A. does B. hadC. would -九年级英语
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• —Could you play football with me this afternoon?.—I'm sorry. I babysit my sister.[ ]A. have toB
• You _______ drive on the left in Hong Kong.[ ]A. can B. mustC. have toD. do-八年级英语
• This dictionary mustn't _____from the library. Youcan only use it here. [ ]A. take awayB. taken
• -_I finish my homework today, Mum?-No, you _ . You can do it on Saturday. [ ]A. Must; don't hav
• -Will you go to the party with us?-I'm not sure, I ___ go to visit my grandma with my cousin.[
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• — _______ you come to our piano lesson?—Sure. I'd love to.[ ]A. Are B. Do C. CanD. Must-八年级英语
• 生态系统中的能量最终都来自于_________。-八年级生物
• Henry ________ be at home because he phoned me from the farm just now.[ ]A. mustn'tB. might not
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• —_ you get some milk for me?—Sure.[ ]A. MayB. MustC. ShouldD. Could-八年级英语
• —_____you play the piano?—No. But I can play the violin.[ ]A. CanB. MayC. MustD. Should-八年级英语
• —Where is your father now?—I'm not sure．He _______ be in the kitchen． [ ]A. mayB. mustC. will D
• I can play basketball, but my sister _____. [ ]A. hasn'tB. can'tC. doesn't D. isn
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• 大气中的_________是碳循环的主要形式。-八年级生物
• You_____ right.[ ]A. may beB. maybeC. can be-八年级英语
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• _____he is in reading room now. [ ]A. MaybeB. May be C. May-八年级英语
• —____I come in?—Comein ,please.[ ]A. MayB. MustC. NeedD. Have to-八年级英语
• The teacher gave back his homework, so he_ do it again.[ ]A. mustB. had toC. needed D. might-八年级英语
• —_________ you play golf ?—No. But I can play table tennis.[ ]A. Can B. May C. Must D. Should-八年级英语