Закончите предложение: 1)Мне никогда не бывает скучно, потому что........... 2)Люблю слушать музыку по вечерам, когда........... 3)Утром встаю к 7 утра, хотя............. 4)В посёлке построили новую школу, так как............... 5)Словом можно спасти человека, если............

Из приведенного перечня :

водород, воздух, дистиллированная вода, углекислый газ, алюминий, гранит, железо, морская вода

выпешите :

а) вещества

б) смеси 

Раскройте скобки , употребляя глаголы в Past Simple или Past Continuos .

1 . The cat ( to take ) a piece of fish and then ( to run ) away . 2 . He ( to read ) a newspaper when I ( to come ) in . 3 . Yesterday I ( to get ) up at seven o'clock . 4 . The train ( to start ) at fifteen minutes to ten . 5 . He ( to put ) on his coat and cap , ( to open ) the door and ( to go ) out . 6 . At this time yesterday I ( to sit ) at the theatre . 7 .  He ( to come ) back to St . Petersburg on the 15th of January . 8 . I ( to go ) to the institute when I ( to see ) him . 9 . At this time yesterday we ( to have ) dinner . 10 . He ( to write ) a letter when I ( to come ) in . 11 He ( to make ) a report when I ( to leave ) the meeting . 12 . Yesterday he ( to write ) a letter to his friend . 13 . When I ( to look ) at them , they ( to smile ) at me . 14 . What you ( to do ) at six o'clock yesterday ?  15 . I ( to go ) to bed at half past eleven . 16 . Yesterday the lesson ( to begin ) at nine o'clock . 17 . When somebody ( to knock ) at the door , she ( to argue ) with her husband . 18 . When Pete ( to jog ) in the park in the morning , he ( to lose ) his Walkman . 19 . When the police ( to take ) the thief to the car , I ( to go ) to the cinema to see the new Tom Cruise film . 20 . He ( to  shave ) when he ( to hear ) her scream

Очень срочно,помогите!Написать йонные уравнения реакции

1)AlCl3 + 3NaOH = 3NaCl + Al(OH)3

2) Na2S + AgNO3 = 2Na2(NO3)2 + Ag2S

3)H2SO4 + ZnS = ZnSO4 + H2S

4)Ba(OH)2 + MgSO4 = BaSO4 + Mg(OH)2

пчелы собрали с липы 10 кг меда.это на y кг меньше, чем с каштана.сколько килограмов меда пчелы собрали с каштана?