A. was sweeping
B. is sweeping
15. While they
13. Our family.
A. is watching
_ the latest news about the huge earthquake in Japan at this time last night.
B. was watching
C. watched
D. watches
through the area.
C. swept
D. sweep
14. When we were enjoying a picnic, a storm suddenly.
TV, a breaking news interrupted their show to announce a sudden earthquake.
A. was watching
B. were watching
C. watched
D. watch
16. A loud thunderstorm
at 6 a.m. this morning.
A. happened
B. happens
C. were happening
D. was happening
17. While I
for the exam, a loud noise outside
me.
A. was studying/distracted B. were studying/distracted C. was studying/was distracting D. studied / distracted
a presentation about the effects of natural disasters at this time last week.
18. Our group
A prepared
B. were preparing
19. While the scientists
C. was preparing D. prepare
research, a sudden volcanic eruption disrupted their experiments.
A. were conducting B. was conducting
20. At this time yesterday, a powerful earthquake,
A. was shaking
B. were shaking
C. conducted
D. conduct
the city.
C. shook
D. shaken