Before the police arrived we had scratched up a bit of breakfast and were feeling better.在警方到达之前，我们已经弄了点早饭吃下，感觉好些了。The vandals scrammed before the police could arrive.那些故意破坏公物的人在警方到达之前迅速离开了。They were careful not to touch anything until the police arrived.警方到达之前，他们小心不去碰任何东西。