2.You are requested not smoke in the restaurant.smoke前加to

3.Some people tried to stop the fight but I didn't want to get involving.involving→involved

4.We hadn't planned to meet.We just met in the hall by the accident.去掉第二个the

5.I need help because the job is much than I can do myself.much→more

Ⅲ.完成句子

1.Do you still remember those occasions on__which/when we walked and talked in the park?

你还记得我们一起在公园里散步聊天的那些时光吗？

2.I'm not interested in what__is__happening in that field.

我对那个领域里发生的事情不感兴趣。

3.Without your help，I would__have__failed the exam last week.

没有你帮助的话，我上周考试可能就通不过了。

4.Every__time__he__came__to__Beijing，he would call on me.

他每次来北京，总是来看我。

5.Will you do__me__a__favour and post the letter?

你能否帮我个忙把这封信寄了？

Ⅳ.单元语法专练(用适当的连词填空)

1.I won't call you，unless something unexpected happens.

2.Small sailboats can easily turn over in the water if they are not managed carefully.