1) He heard a strange voice while he was walking into the house.
He was walking into the house__when he heard a strange voice. ( WHEN)
2)After taking the train, we took the bus and went to the hotel.
We_took the train, then we took the bus and went to the hotel. (THEN)
3) The children were playing football when it started to rain
It started to rain_while the children were playing football (WHILE)
4)The phone rang and I woke up
I woke up when the phone rang ( WHEN)
5) We were having a picnic when a dog ran over to us and stole a sandwich
A dog ran over to us and stole a sandwich as we were having a picnic ( AS )
6) I was walking down the street when I found a gold earring
I found a gold earring__while I was walking down the street ( WHILE )
2b
3a
4a
5b