Put the verbs in brackets in the correct tense (past perfect- continuous or past simple)
1. Nick (1)______ (wait) for the bus before he (2)______ (see) me.
2. Charlie (3)______ (study) before she (4)______ (hear) the crash.
3. Tony and Jane (5)______ (talk) properly before Jane (6)______ (start) an argument.
4. Rose (7)______ (read) a novel before she (8)______ (sleep).
5. Dennis (9)______ (become) a good boy. Before that he (10)______ (bully) the younger children.
6. We (11)______ (clean) the house for two days before the guests (12)______ (arrive).
7. They (13)______ (be) very tired because they (14)______ (run) for 2 hours.
8. I (15)______ (catch) flu because I (16)______ (walk) in the rain last night.