Изучи правило в рамке. Затем объедини предложения, используя выделенные слова. We use as soon as, when, after, until

1) Otto and Axel decided to go on a dangerous journey as soon as they found a message.2) They looked around until they heard a noise.

3) They hid behind some bushes when they heard the noise.

4) After Axel found an old knife, they went to meet Hans.