The European Commission (EC) has ordered a recall of a smartwatch for children because it has a &quo

A. Join in school activities. B. Observe their kids’ behavior.
C. Keep in touch with their kids. D. Connect with their kids' teachers.
30. What’s the problem with the smartwatches according to the EC?
A. The system may break down. B. Personal details may be stolen.
C. Communications may be disturbed. D. Strangers can steal the phones easily.
31. Which of the following best explains “violated” underlined in Paragraph 6?
A. Turned to. B. Belonged to.
C. Stood for. D. Went again.

答案28-31 A C B D