5 Why are they so exhausted?
8 What time are they setting off tomorrow?
2 When do you think they'll be here?
6 Why didn't the students respond?
4 Why couldn't we use the rooms?
1 Why didn't you call?
3 Why did they look so hot and sweaty?
7 Why were they apprehended?
f Well, they hope to have been driving for five hours by lunchtime.
h They've been working al1 day up in the attic.
d 1 was going to, but 1 clean forgot.
c They must have been doing something wrong.
e They weren't listening.
b 1 think they'd been working out in the gym.
g They were being cleaned.
a They could be arriving at any moment.