请设计一节课的教案，达到以下目的：
1．学生能够正确搭配否定前缀dis-，im-，un-，non-；
2．培养学生区分两种定语从句的能力。

单项选择题What might be the cause of the children’ s sickness().

A. The crops didn’t do well.
B. There were too many insects.
C. The visitors brought in diseases.
D. The pesticides were overused

填空题57.

问答题The best example of universally understood body language may be smile. A smile can help us get through difficult situations and find friends in a world of strangers. A smile can open doors and tear down walls. 注意: 1.无须写标题; 2．内容只需涉及一个方面； 3．词数在100词左右。

单项选择题According to the text, what is the major cause of the flooding spam().

A. Companies rely on e-mails for communications.
B. More people in the world communicate by e-mails.
C. Many computer viruses contain spam e-mails.
D. More advertisers begin to promote sales through spam.

单项选择题A good agent can help you().

A. know more people
B. find" cheap accommodation
C. get the right accommodation quickly
D. get free information about most accommodations

单项选择题If you have fair weather friends,().

A. they will give you all that they have when you need help
B. you will be refused when you get into trouble
C. you will become rich
D. you can be sure that you get real friends

单项选择题17().

A. before
B. unless
C. until
D. because

单项选择题Why did the villagers agree to sell frogs().

A. Because the frogs were easy money.
B. Because they need money to buy medicine.
C. Because they wanted to please the visitors.
D. Because the frogs made too much noise.

问答题56.

单项选择题All the following are included in the price of ￡ 299 EXCEPT().

A. transport between the airport and the hotel
B. telephone calls made by tourists
C. the services of guides to tourists
D. double rooms for every two tourists