An earthquake (1) deep underground, but makes rocks on the surface (2)
open. Windows break and walls crack. People find it difficult (3)
. Fires break out because gas pipes and electrical wires (4)
. When water pipes burst, it is difficult for firefighters (5)
fires. When the shaking (6) stronger, buildings
crumble and bridges collapse.
1 start / is starting / starts / have started
2 to crack / cracking / crack / cracked
3 stay standing / to stay standing / staying stand / stay stand
4 damaged / were damaged / are damaged / have damaged
5 having put out / putting out / to put out / to putting out
6 become / becomes / has become / became
