a)they had lunch while they were waiting for the plane.
b)When she put new batteries in the toy, it started working again.
c)While I was walking home,I fell over and cut my knee.
d)Helen didn't say hello when I saw her this morning.
e)While you were out jogging, Frank brought your book back.
f) Did everybody home when the concert finished.
a)Your Mother rang while you had a bath.
b)They were buying food for the party when we saw them.
c)While she was at shop, she met her old friend.
d)We parked our car when we had an accident.
e)What were you reading, when I came into the room?
f)While I was chopping the onions, I cut my finger.