1. She forgot to lock the door.
2. If you leave the lights on all night, you will waste electricity.
3. In case there is an emergency, ring this number.
4. There is a strange fingerprint at the crime scene.
5. People need to lock all the doors before going out.
6. It is difficult to suppress wildfire.
7. It was a 5-hour trial.
8. There are 20 members in the criminal organization.
9. It is the speed that people need to control when driving.
10. The investigators went to the crime scene by car last week.
11. The surveillance lasted 5 months.
12. However experienced you are, driving at that speed is dangerous.
13. The lady threatened the man to leave her house or she would call the police.
14. Jack likes car-theft computer games, and so does his friend Ed.
15. The policeman asked the victim, "How much money do you have in your purse?".
