词汇；根据句意和汉语提示，在空白处填入适当的单词。
1. Ban Ki-moon was chosen as the eighth leader of the U. N. in________, 2006.
2. Today Linda's parents are out, she has to stay at home________.
3. Maggie is fond of_________pop songs from the Internet.
4. The audience_________their hands as the performers stepped on the stage.
5. For some_________reason, Tony lost his job.
1. October 2. alone 3. downloading 4. clapped 5. unknown
B
C
D
means______. 
B
C
D
