There's terrible accident! Call the police as soon as/ while you can .
The lion stood and looked at me , but while/after a few minutes it walked away.
While/When we were walking in the forest , a monkey jumped down in front of us.
I took a photograph of the beautiful bird as soon as/ while i saw it .

1. as soon as

2. after

3. when

4. as soon as

There's terrible accident! Call the police as soon as you can .

The lion stood and looked at me , but after a few minutes it walked away.

While we were walking in the forest , a monkey jumped down in front of us.

I took a photograph of the beautiful bird as soon as i saw it .