16. For each empty space (1-6) choose the correct answer (A, B, C or D). An earthquake (1) when there are sudden movements in Earth’s crust that make the ground shake. Most earthquakes are small, and we (2) them, but during large earthquakes, rocks (3). The land may split apart along a crack in the crust (4) a fault line. Some large fault lines (5) above places where (6) plates meet.
1 happened / happen / happens / has happened
2 didn’t notice / don’t notice / not notice / not noticed
3 are trembling / tremble / trembled / trembling
4 calls / call / called / were called
5 are lying / lay / lie / lying
6 Earth’s / Earth / Earths / Earth’
