假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌的以下作文。

文中共有10处语言错误，共有10处语言错误。请在有错误的地方增加、删除或修改某个单词。

增加：在缺词处加一个漏词符号(/\)，并在其下面写上该加的词。

删除：把多余的词用斜线(＼)划掉。

修改：在错的词下划一横线，并在该词下面写上修改后的词。

注意：1.每处错误及其修改均仅限一词；

2.只允许修改10处，多者(从11处起)不计分。

Manager,

I am an exchange student from China. Yesterday, I went to your cinema to see a film. The film was very well, but I did not enjoy it because there were some problem in the cinema.

First, the film was delayed as there were so much advertisements at the beginning. It was rather annoyed. Second, the sound of the film was too loud that I could hardly bear. The EXIT signs could not be seen clearly, which presented potential safety hazards. If something terribly should happen, it will be difficult for people to get out quickly.

As a visitor to your city, I’m disappointed with my experience in your cinema. I am writing a letter in the hope that you can consider about these problems and make some improvement.

Yours faithfully,

Li Hua

假设你是李华，David是你的美国网友。他对目前中国出现的雾霆天气很关注，来信向你询问此事。请你给他写封回信。

主要内容如下：

1.感谢他的关注。

2.简介雾霾 (smog) 天气给人们的身体、生活带来的危害。

3.谈谈你的感想。

注意：可适当增加细节，以使行文连贯流畅；

开头与结尾已写好，不计人总词数；

词数：120左右

Dear David，

I'm glad to receive your letter.

Yours，

Li Hua

In the experiment we kept _____ watchful eye on ______ developments and recorded every detail.

A．a; /              B．/; the             C．a; the            D．/;/

We spent hours driving and another few hours waiting, only _________ that the plane would be delayed until midnight.

A．to be told         B．having told         C．to have been told   D．told

 With the help of the collected money, subways can be built sooner and better, _______ brings convenience to citizens.

A．as               B．what             C．who              D．which

 Most experts agree that human activities such as the clearing of large areas of forests, and farming on a large scale _________ the problem of global warming.

A．is leading to        B．is resulting in       C．are contributing to  D．are owing to

The government is aiming to reduce the unemployment, but it’s quite _______ to have a job at all these days.

A．anything          B．something         C．somewhere        D．nothing

Whenever Steve sang in the shower, his voice _______ throughout the house.

A．has rung          B．would ring         C．was ringing        D．had rung

________ anything like this style of architecture before, we thought we were looking at giant sculptures, not buildings.

A．We had never seen                     B．Never having seen

C．Never being seen                       D．Never had we seen

 Steve wanted to play a trick          Tom, but gave himself          by laughing.

A．on; over          B．with; away         C．with; on           D．on; away