According to Paragraph 2, which of the following may lead to insomnia?
A、Reading a book for relaxation before bedtime.
B、Lowering lights one hour before bedtime.
C、Drinking some warm milk before bedtime.
D、 Listening to rock music before bedtime.
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’