问题
选择题
_____ is believed that the betterknown companies spend about 70 per cent of the total cost of the product itself on packaging!
A．This
B．One
C．That
D．It
答案
答案：D
此题考查代词。it 是形式主语，that引导的从句是真正的主语。It is believed that...“人们相信……”。