请根据要求改写下列句子，每空一词。

81. Peter is so imaginative that he can come up with new ideas. (保持句意基本不变)

Peter is __________ __________ to come up with new ideas.

82. The dentist often adivses us that we should brush our teeth twice a day. (改为祈使句)

The doctor often says to us, “__________ __________ teeth twice a day.”

83. “Who is responsible for the food safety problem?’’ asked the reporter. (改为宾语从句)

The reporter asked __________ __________ responsible for the food safety problem.

84. Jim’s office is four kilometres away from the nearest underground station. (对划线部分提问)

 __________ __________ is Jim’s office from the nearest underground station?

85. Though the earthquake destroyed many houses, people didn’t lose hope. (改为被动语态)

Though many houses __________ __________ by the earthquake, people didn’t lose hope.