Where was the experiment carried out
A) In a crowded street. C) In a laboratory.
B) At crossroads. D) At a police station.

单项选择题Which of the following is the best title of this passageA) Music and Psychology C) Music -- a New Cause of Traffic AccidentsB) How to Drive Safely D) Musical Effect on Drivers

单项选择题What does the word provided mean as used in the passage (Line 3, Paragraph 3)A) describe as a story C) state as a conditionB) give what is needed D) prove what is required