Can't be could / switch might not/be might / throw
must be must leave must / miss
look at
guesse
b: it?
a: oh no. a traffic jam. there must have been an accident.
an accident. i was once on a motorway
and a lorry was on fire.
a: how did that happen?
b: i don't know. someone 3
la cigarette from a
bridge. it 4
_ a very big fire because the lorry
was okay when we finally passed it but the road was
closed for ages.
n
he roof:
ere. must/
w
a: where's dan? he's late.
b: he 5
_his bus. why don't you phone him?
a: i tried but there's no answer. he 6
it at
home.
b: or he 7
it off. you know dan. he switches it
off in school and then forgets to switch it on again.
1/ fly
stairs. may/​

1) They always take the pictures on holidays. The pictures  are always  taken on holidays by them
2) Do people write letters nowadays?Are letters wriiten by people nowadays?
3) We never expect rainstorms in winter.Rainstorms are never expected in winter by us 
4) Postmen usually bring daily newpaper in the morning. Daily newspaper is usually brought by postmen in the morning
5) He often breaks fragile things.Fragile things are often broken by him
6) People often grow vegetables and flowers in greenhouse. Vegetables and flowers are often grown in greenhouse by people
7) Schoolchildren occasionally burn dry leaves in autumn. Dry leaves are occasionally burnt in autumn by schoolchildren
8) We hardly ever make marmalade from lemons. Marmalade from lemons are hardly ever  made by us 
9) The doctor cured your dog in no time.Your dog was cured in no time by the doctor 
10) Walt Disney created a lot of funny characters in his cartoons.A lot of funny characters were created by Walt Disney in his cartoons
♥♥♥

1. Pictures are always taken by them on holidays.
2. Are letters written by people nowadays?
3. Rainstorm is never expected in winter by us.
4. Daily newspapers are usually brought by postman in the morning.
5. Fragile things are often broken by him.
6. Vegetables and flowers are often grown by people in greenhouses.
7. Dry leaves are occasionally burnt by schoolchildren in autumn.
8. Marmalade is hardly ever made from lemons by us.
9. Your dog was cured by the doctors in no time.
10. A lot of funny characters were created by Walt Disney in his cartoons.