A was ringing
B rung
C rang
A watched
B was watching
C were watching
3.The dog …at me while I was locking the door.
A were barking
was barking
C barked
A used
B have already used
C has just used
A have just
B has just
C just
A yet
B so far
C already
A have seen
B has seen
C saw
A yet
B twice
C always
A finally
B to my surprise
C suddenly
A amazingly
B unfortunately
C then
A in…ago
B to… ever
C to… before
A has… for
B has just
C have since