计算：（1）9a-4a+a（2）212-448+327．-数学

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• 计算：（1）-3-(-16)(-36)；（2）123÷213×125；（3）212+3113-513-2348；（4）48-54÷2+(3-3)(1+13)；（5）3a2b-(ba÷21b)．-数学
• —Did you hear about the air crash? I feel so lucky! —Yes．If you _____ that flight, I _____ speaking
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• ----Hi, Tracy; how are you doing?-----I’m tired out, for I ______my living room all day.A．paintedB．h
• 计算：（1）18-212-1432（2）a2-128a-2a．-数学
• 下列计算正确的是（）A．3+5=8B．3+5=35C．6a-5a=aD．5a-4a=3a-数学
• 当a=7+5，b=7-5时，a-b=______．-数学
• 计算：(18-48)-(0.5-213-32)-数学
• — I’m sorry, I shouldn’t have been so rude to you.— You _____ your temper，but that’s OK.A．have lostB
• -- Miss Wang ,I hear that you ___________along the Mekong River. Have you got everything ready?--Alm
• —Time. It’s likely that we will miss the bus.—Don’t worry. There are still 10 minutes left.A．has run
• 计算：（1）75-108+54-3（2）（4+23）（4-3）（3）1848-（23412-234）（4）15[（5+12）2-（5-12）2]-数学
• By the time Jack returned home from England, his son. from college.A．graduatedB．has graduatedC．had b
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• 化简：12+1+13+2+…+199+98+1100+99．-数学
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• I ______ Beijing for Shanghai in a few days. Do you know when the earliest plane ________?A．leaves;
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• （1）12a+34a3-78aa5-14a2a7（2）(4bab+1aa3b)-(3aba+9ab)(b＞0)-数学
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• 计算：18-32+2-数学
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• Up to now, the program ______ thousands of children who would otherwise have died.A．would saveB．save
• —________youreadthestory?—Yes.I_____________itatschool.A．Have;readB．Did;readC．Have;havereadD．Did;hav
• Look! The students are showing how to operatethe mechine in the workshop now. A B C D-英语
• Man _____ profit, sometimes even being unaware of the harm he has done to the environment.A．is alway
• ---Are you still going work on foot?---Yes. My car _______ in the garage.A． is being repairedB． has
• 化简：18-8=______．-数学
• —Haven't I told you that you should be home earlier?—Yes, but I________home earlier than I usua
• 计算：（1）20-595（2）16a2+6a9-数学
• Ladies and gentlemen, please fasten your seat belt. The plane __________. A．takes offB．is taking off
• 计算：22+8-412．-数学
• It took me a long time before I was able to fully appreciate what they ______ for me.A．had doneB．did
• 化简：212+27=______．-数学
• 化简：38-532的结果为______．-数学
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• ----This returned Chinese scholar has become one of the top experts in this field.----Yes,I know him
• 一个三角形的边长分别为8，18和4，则它的周长是______．-数学
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