when the rain started,we got to the station.
my clothes got wet when it was raining.
the birds became afrid when the big dog was barking.
we were on holiday when we took a lot of photos.
they were just ready to drive to the park when they friends arrived.
the boy pushed him when he tripped and fell.7.the birds(become)afraid/the big dog(bark)这个是重复的了吧