1. Whenever | Before you stay home alone, don’t open the door to strangers.
2. He had been addicted to technology before | after he sold everything and moved to live in a forest.
3. People don’t break the law when | until they cross the street in this place.
4. Remember to lock the door after | before you leave for school in the morning.
5. You should wait while | until you’re asked to enter.
