Complete thefollowing sentences as required（根据所给要求，完成下列句子。每空格限填一词）：

【1】Both of the two brothers have saved enough money to buy a new flat. （改为否定句）

_______of the two brothers _______saved enough money to buy a new flat.

【2】The reporter interviewed the actor in order to get some useful information. （对划线部分提问）

_______ _______the reporter interview the actor？

【3】The students have performed the play Sound of Music for years. （改为被动语态）

The play Sound of Music_______ _______ performed by the students for years

【4】The old man is very weak. He cannot walk for 20 miles every day. （合并为一句）

The old man is_______ weak_______ walk for 20 miles every day.

【5】It's a piece of cake for Frank to work out the problem. （保持句意基本不变）

It's_______ for Frank to_______ the problem.

【6】Do you always catch such an early train？The policeman asked the man. （合并为一句）

The policeman asked the man _______he always_______ such an early train.

【7】all the cleaning，do，the old woman，herself，had to（连词成句）

________________________________________________________.