英语时态填空Bob______(start)______(surf)the internet at one o cloc

英语时态填空
Bob______(start)______(surf)the internet at one o clock.Now it is three.He_____(be)online for two hours.He_____(look)for some information about the 1976 Tangshan Earthquake.He______(feel)very happy because he______(find)some useful facts.He______(decide)_____(make)a PowerPoint.
The students_____(have)a geography lesson yesterday morning.In the lesson,they______(learn)a lot about earthquakes.They______(learn)that earthquakes_______(happen)everywhere in the world,and that they_______(be)disastrous.
"What_____(can)we_____(do)if an earthquake______(occur)?'the young girl______(ask)her mother."A lot,"her mother______(answer)."Usually clothes ,medicine and food_____(need)in the earthquake_stricken area.We_____(can)______(donate)money and clothes to victims.'