[简答题]The focus on ______destroys any awareness and action that might help to change the trend.

[填空题]The policemen (tell) ________ not to take any action until they received further order.

[单项选择]

Until recently the opportunities for criminal activities on the Internet have been low. However, the volume of business done on the Internet is growing rapidly such as ordering books and other products and making money transactions. All this is creating temptations for hackers.
Hackers are often young people who are interested in computers. They use them to move quietly to the Internet, looking for ways to break into computer’s systems run by banks, telephone companies and even government departments. They look for examples of credit cards and try to steal the numbers.
Hackers rarely admit to a successful break-in. The first indication of a hacking may be when a customer discovers a wrong money transaction on a credit card account. It is harder to check on somebody misusing an online connection unless there is a massive download of information which would call the attention of the consumer.

The main idea of the first paragraph is that（）.
A. the opportunities for criminal activities on the Internet have been low
B. the opportunities for criminal activities on the Internet are low
C. there are more opportunities for criminal activities on the Internet
D. people should not make money transactions on the Internet

[填空题]Eighteen states have enacted laws to regulate activities in wetlands.

[填空题] Many teachers watch and listen while speaking activities are taking place. They note down things that seemed to 【B1】______ well and times when students couldn’’t make themselves 【B2】______ or made important mistakes. When the activity has finished, they 【B3】______ ask the students how they thought it before giving their own feedback. They may say that they liked the way Student A said this and the 【B4】______ Student B was able to disagree 【B5】______ her. They will then say that they did hear one or two mistakes and they can then either discuss them with the class, write them on the board 【B6】______ give them individually to the students 【B7】______. In each case, they will ask the students to see if they can 【B8】______ the problem and correct it. As with any kind of correction, it is important not to single students 【B9】______for particular criticism. Many teachers 【B10】______ with the mistakes they heard 【B11】 ______saying who made them. Of course, there are no hard and f
A. A．and
B．but
C．or
D．nor