based on 3C ex.2 How long before the bus arrived? Pam out with her friends after she had finished her homework. We couldn't leave the lab until we the culture plates first. I lost my keys as I home.
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Задание

basedon3Cex.2
Choosethecorrectitem.

  1. Howlong[had you been waiting|were you waiting]beforethebusarrived?
  2. Pam[went|had gone]outwithherfriendsaftershehadfinishedherhomework.
  3. Wecouldn'tleavethelabuntilwe[cleaned|had cleaned]thecultureplatesfirst.
  4. IlostmykeysasI[was walking|had been walking]home.

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