题目内容：

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

1.She put the digital camera on the bed just now.(改为否定句）

She _____ _____ the digital camera on the bed just now.,

2.Does Kitty often sing these English songs?(改为被动语态）

_____these English songs often_____by Kitty?

3.The book is asking us to try our best to protect our environment.(对划线部分提问）

_____ _____the book asking us to do?

4.Anna played amazing music in yesterday’s concert.(改为感叹句）

_____ _____music Anna played in yesterday’s concert!

5.The problem was so difficult that none of us could solve it.(保持句意基本不变）

The problem was  _____difficult for_____of us to solve.

6.Why are trees are our best fighters against pollutions? Do you know?(合并成一句)

Do you know why_____ _____our best fighters against pollution?

7.think about，all the time, must, disasters, we，natural (连词成句）

_____________________________________________________________.