The passage is mainly concerned with ________.

A. research on TV's influence.
B. sex and violence on TV.
C. parents' protest against sex and violence on TV.
D. effective control of TV's influence on children from within the home.

[音频]B) Its top is hidden in clouds of volcanic smoke.C) Its height changes with each volcanic eruption.D) It has a recorded history of 1500 years.2. (17). A) The are now a tourist destinations.B) They attract a lot of migrating birds.C) They provide shelter for the farmers.D) They make good fileds for farming.3. (18). A) They nest on the volcano's slopes.B) They feed on certain small mammals.C) They compete with each other for food.D) They match large mammals in strength.

[音频]

A. She didn’t invite the speaker early enough.
B. She wasn’t very familiar with the speaker.
C. She didn’t want to make the speaker feel disappointed.
D. She forgot to leave a place for the speaker at the table.

[音频]

A. In England.
B. In India.
C. In Africa.
D. In any place except England.