题目内容：

完成句子

根据所给提示，完成句子，每空一词，含缩略词。

1.There were some people in the park last week. (改否定句)

There ________ ________ people in the park last week.

2.He put the camera in the drawer this morning. (划线部分提问)

_________ _________ he put the camera this morning.

3.The old man died five years ago. (改为同义句)

The old man has been _________ _________ five years ago.

4.我们必须阻止人们砍伐太多的树木。(完成译句)

We must ________ people from __________ down too many trees.