题目内容：

 

1.过去这儿有一个工厂。

There _______  ________ be a factory here.

2.现在的水比以前干净多了。

The water now is ______  _________ than before.

3.格林一家离开家乡有10 年了。

The Greens have_______  ________ from the hometown for 10 years .

4.在过去的几年里阳光镇发生了巨大变化。

Many changes have ________ _________ in Sunshine Town over the years.

5.到达山顶后，他忍不住拍了许多照片。

After he got to the top of the mountain ,he couldn’t _______ ________ photos.