Put the verbs in brackets into the present perfect or past simple tence. 1. this is the third time we (to observe) such results 2. in 1812, one of the customers at riebau's shop, (to give) faraday a ticket to attend the last four lectures of a course given by humphrey davy at the royal institution of great britain. 3. the researcher (to try) his experiments twice. he is happy with the results. 4. vacuum cleaners, toasters, dishwashers and other appliances greatly (to improve) domestic work by reducing physical labor. now it takes much less time and effort. 5. his laboratory (to develop) the most efficient communications networks and protocols since then. 6. around 1600, the english philosopher and scientist francis bacon (to state) that heat itself is motion and nothing else. 7. the graduates of that university never (to receive) a solid technical foundation, so they have poor opportunities to work in many special areas

Популярно: Английский язык

• 

  елен9

  04.08.2022 09:35
  Фанаты рока,да и простые люди. прошу вас мне ^^ это считается ,ибо...
• 

  marda69

  31.12.2021 00:04
  What do you associate canada with? write 3-4 sentences. если можно,...
• 

  nastia19022004

  03.01.2023 18:47
  Составьте предложения со словами venom и loss...
• 

  380969330270

  03.01.2020 03:33
  Вставь пропущенные местоимения my,your,his,her,its,our. what is...
• 

  Bohdanka999

  13.01.2022 15:07
  Написать эссе на тему: 3 хороших вещи про компьютер и 3 плохие...
• 

  annet150586

  16.05.2020 16:13
  )нужно. )) 1)the australian aboriginal people who lived in what...
• 

  nikitleas

  21.10.2021 21:43
  Ағылшын.....рахмет....​...
• 

  Luhfeeqq

  21.11.2021 06:15
  Составить правильное предложенния. 1)Do, morning exercise, must,...
• 

  Lokkinine

  09.04.2020 17:44
  Зробити графічне зображення гаманця будьласка дуже, будьласка зробіть...
• 

  gyulmalievasab

  10.08.2021 02:34
  Нужно по два предложения со словами PAIR и COUPLE​...