What does the passage mainly discuss？
A. The relation between culture and invention.
B. The transmission of human culture.
C. The history of human civilization.
D. The biological evolution of man.
听力原文：What kind of activity is defined as complex activity？
(28)
A. Carrying out reading activities.
B. Comparing newspaper remarks.
C. Finding information in a book.
D. Answering written questions.
扣缴义务人应当自扣缴义务发生之日起60日内．向所在地的主管税务机关申报办理扣缴税款登记，领取扣缴税款登记证件。()
A. 正确
B. 错误
【B5】
A. although
B. despite
C. so
D. because
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