________ the machine begins to work, you can’t stop it _____.

China Daily is _________ a newspaper. It helps greatly to improve our English.

Tonny’s parents thought he was at school，but________he was in a net bar.

He looked at those jewels one after another ______and seemed to show no interest in any one of them.

---How was your driving test going?---Not very well at first, but after many attempts I ____ passed it.