Chương 34.10 Bài Tập 139

V.

1. met - were going - was going - had - were waiting/ waited
2. was cycling - stepped - was going - managed - didn't hit
3. was flying - encountered - dropped - was carrying
4. were working - discovered - contained - were filming - found
5. was making - started up - was speeding - saw - called
6. stopped - was speeding - were searching - found - was taking
7. were coming - saw - appeared - stopped - got - were watching - flew - disappeared
8. finally found - was already - were talking - were speaking - were conversing - just sat - chose - sat - walked - stopped