`5.` Dan would arrive safe if he drove slowly.
`6` You could have no trouble at school if you had done your homework.
`7` If you swim in this lake, you'll shiver from cold.
`8` The door will unlock if you press the green button.
`9` If Mel could have ask her teacher, he'd have answered her questions.
`10` I would call the office if I was/were you.
`11.` They will not survive in the desert if they do not take extra water with them.
`12` If you press CTRL + s, you will save the file
`13` If they had offered me the job, I would have take it.
`14` If you had check the car, it could have not break down in the middle of the desert.
`15.` If his older brother hadn't driven so fast, he wouldn't have crashed into the other car.
$#Đào$