单项选择题

The main idea of the second paragraph is

A．how to avoid double-click on infected email attachments.
B．how emails both carry and spread viruses and worms.
C．what new viruses can automatically launch themselves.
D．what new viruses are capable of with an double-click on.

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单项选择题

Which of the following statements is true, according to the author

A．Mimicking is the most difficult task for the teacher and students as well.
B．The teacher has to explain to the students without taking up too much time.
C．The sessions are essential to the students' carrying out the particular activities.
D．Once the target of the activity is settled, nothing should change any mor

单项选择题

It is the responsibility

A．of the teacher to make clear to the students the relevance of the activity and the target.
B．of the teacher to see the relevance of what they're doing and their own personal goals.
C．of the students to understand the activity cognitively before they tackle something.
D．of the students to identify clearly their targets before they do anything in class.