单项选择题

In Line 1, Para. 4, the expression "economic forces are unfettered" means _______.

A．prices are determined by consumers
B．supply and demand are allowed to operate freely
C．economic regulations are not enforced
D．the economy is growing

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单项选择题

The word it (in Line 10,Para. 2) refers to _______.

A．a scene we saw on television
B．a symbolic object or action in dreams
C．an incident or fact we have forgotten
D．a book or a newspaper report we read last week

单项选择题

The example given in Para. I shows that dreams often _______.

A．assume a symbolic nature
B．help us to master physical skill
C．represent some difficulties we have in life
D．remind us of what we forget in waking life