Everyone was silent as the judge__________the winner of the artistic gymnastics competition.

The policemen ______ the house again and again, and finally found the evidence.

(2013·山西大学附属中学期中测试) The news of a famous educator's coming to our school for a visit was ________ on the radio yesterday.

The generation________makes it difficult for parents to understand their children’s opinions.

Some solid evidence proves that water really exists on Mars, but unfortunately, there is still no             of life.