Why does social media get risky according to the author?
A、The users’ social connection is lost.
B、The users’ messages may be ignored.
C、The users ' real emotion may be hidden.
D、The users' voices can hardy be heard.
Directions:In each of the following groups of words, there are four underlined letters or ltter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet’
A、 action
B、 section
C、 solution
D、 question
What can be iferered from the passage about“doing nothing" ?