 The alarm was first gone off on the third floor.                  

　The alarm was first gone off on the third floor.                                         1.       

People left the building hurriedly but in a orderly manner.                                    2.       

They came out carry their shopping bags and their parcels，                           3.       

some not properly wrapped and some not even paid.                                     4.       

Most passer by waited in the street to watch.Many of the                               5.       

shops and offices in the street had just closed.Mr Clement，                           6.       

the officer in charge of，ordered all hoses(软管)                                          7.        

to turned to the roof of the main building.People were pushed                        8.       

back from the area of their own safety.Seven officers                                  9.       

entered the basement or were driven back within minutes.                              10.       

Hurriedly they put on their masks(防毒面具)，ready to try again.

1.was→had　

2.a→an　

 3.carry→carrying　

4.paid后加for　

5.passer-by→passers-by　

6.√

7.去掉of　

9.of→for　

 10.or→but　

1.was→had　go是不及物动词，不能用于被动语态。was gone中gone是形容词，表示“不见了；走了”。

2.a→an　orderly是以元音音素开头的，所以用不定冠词an。

3.carry→carrying　carrying...是现在分词短语作谓语动词came out的伴随状语。

4.paid后加for　pay for表示“付钱买东西”。

5.passer-by→passers-by　由其前面的修饰语most可知，该处应该用名词复数形式。

6.√

7.去掉of　在in charge of短语中，of后应该接宾语，没有宾语应该去掉of。

8.turned前面加be　hoses不能自己指向屋顶，必须由人操作，所以用不定式的被动式。

9.of→for　介词for常用来表示目的，for their own safety指“为了他们的自身安全”。of无此意。

10.or→but　这里表示意义上的转折，所以用but。