By the time he (return) home from England next month, they (already /build) a new house for him

H2O không tác dụng được với những đơn chất, hợp chất nào (đầy đủ)

Tỉ khối hơi của 1 khí so với khí khác( mà trong khí đó có nhiều chất) thì tính như nào nhỉ??

giải hai đề này dùm mình với ..

Giúp e câu này với E cảm ơn trước ạ

một người bán rau được 120000 đồng biết người đó dã lãi 20% so với số tiền mua tính số tiền vốn ban đầu

1: Mary has answered the teacher’s question...? A: has he B: Didn’t she C: Hasn’t she 2: Your coat got we yesterday.....? A: Didn’t you B: Didn’t it C: Doesn’t it 3: I’m early....? A: am I B: are not I C: aren’t I 4: Those plates are very dirty....? A: are they B: aren’t they C: weren’t they 5: Mrs.Lan was sick....? A: was he B: wasn’t she C: isn’t she 6: The costumes look gorgeous....? A: don’t they B: can’t they C: can you 7: My pen is blue . His pen is red...? A: isn’t he B: aren’t I C: isn’t it 8: We designed our own house....? A: Didn’t they B: did we C: didn’t we 9: It’s getting colder ....? A: is it B: isn’t it C: isn’t he 10: Everyone has left the dangerous area...? A: haven’t they B: isn’t it C: are they 11: Everything happens for a reason....? A: is it B: doesn’t it C: aren’t they 12: Everyone must observe traffic regulations...? A: must they B: mustn’t they C: mustn’t we 13: Hardly a day goes by without thinking of her..? A: is it B: does it C: doesn’t it 14: She has never been to Ha Long Bay....? A: has she B: hasn’t she C: is she 15: Someone has told him about her death....? A: have they B: haven’t they C: hasn’t he

1- That woman be Spanish but I am not sure. She sounds Spanish though. 2-What I do? Do you think I should go to the party with Michael? 3 - You park here. You will get a parking fine if you do. 4-You. have called Sally. I have already called her. 5-I speak English when I was young but now I 6-You wear a helmet if you ride a motorbike. 7-Mandy - go to Rome next year but she is not sure. 8- Take an umbrella. It _snow if the temperature goes down. 9-You walk. I can give you a lift if you want. seen that film. It's one of the best films I've ever seen. 11-I hope I - pass all my exams and go to university next year. 12- They be out. All lights are off. We __come back tomorrow. 13-You - use your mobile phone at the cinema. Turn it off! - told me Peter has already got a girlfriend. 15-She heard the phone ringing. She had her headphones on. 16-Tom told me he swim when he was four. His parents taught him. 17-You shout at me. I am not deaf! 18-He go to the military service last year. 19-My car is filthy. I_ wash it before the wedding. 20- Charles, do you think you - pass your driving test soon? 21- The meeting has finished. You leave now if you are not feeling well. 22-Your eyes look red. You _ been crying. What's wrong? 23-In my opinion you visit your aunt. You haven't seen her for a long time. 24-Serena, I use your mobile, please? I left mine in the office. 25-1 come with you if I had known George was there. 00000D 26-1 wear a uniform when I was a flight attendant. Q T 27-Shelley come for the weekend if she can book a flight. 28-Sorry Amanda. You _ - use my computer. You broke it last time you did. 29-You - speak Spanish here but English, otherwise you'll never learn. 30-Pat be so stubborn and go to the doctor's when she's not well. 31-You _seen that film. They are still shooting it. have a lot of money. 32-She's wearing a fur coat. It looks expensive. She 33-You step on the grass. You are not allowed to. - have seen that play. It was grec 34-We went to the theatre last night. You _ 35-We hurry to catch the train. We've got plenty of time. 36-You be exhausted. You have been working all day non-stop.​

By the time (return) home from England next month, they (already / build) a new house for him.

nam nặng 34kg.trọng lượng của nam là