Join the sentences. Use the words in brackets. 1 He was walking slowly down the road. It started raining. (when) 2 The birds were singing. The sun was shining. (while) 3 She ran towards the police officer. She asked for help. (and) 4 I returned the wallet. I found the owner's address. (as soon as) 5 She hid the letter in the drawer. She opened the door. (before)