3. Put the verbs in brackets in past perfect or past perfect continuous. 1) They … for hours before they realised they were lost. (walk) 2) Peter was upset because he … a horrible car crash. (see) 3) How long … before the accident happened? (Aaron/climb) 4) Ann felt cold because she … to take her coat. (forget) 5) Tom … for two hours when the rescue helicopter finally arrived. (wait)

1. They had been walking for hours before they realised they were lost.
2. Peter was upset because he had seen a horrible car crash.
3. How long had Aaron been climbing before the accident happened?
4. Ann felt cold because she had forgotten to take her coat.
5. Tom had been waiting for two hours when the rescue helicopter finally arrived.

Ответ: had been walking; had seen; had Aaron been climbing; had forgotten; had been waiting.