3 Rewrite the sentences beginning with the words shown.
a I was walking to school when I met my friends.
While __________________________________________________________________.
b We were playing tennis when it started raining.
It _____________________________________________________________________.
c While they were having dinner, the telephone rang.
They __________________________________________________________________.
d She was talking to her friends when her dog ran away.
Her ___________________________________________________________________.
e While we were watching a DVD, the teacher came in.
We ___________________________________________________________________.
f I was having lunch when my friends arrived.
My ___________________________________________________________________ .