下列各项中，没有语病的一项是(　　)

The policemen_____ the thief when the accident happened.

32. The mountain is covered with heavy snow and it is ______ only by helicopter.

When you communicate with people, it is not unusual to find yourself in a situation ____ you have to politely decline an offer.

Would you like some meat —______. I’m full (饱的). I don’t C