When I passed the entrance examination,I couldn’t help my success.

What did you do on April Fool’s Day — I played a trick my brother.

There are no customers in the hotel. It______ have the friendliest service.

Many experts considered _________ quite necessary for the people in the earthquake-hit areas to be given a lecture on psychological comfort.[ ]

The cigarette end thrown away by a careless farmer _____ the big forest and brought us great loss.