单项选择题

The passage is based on the author's _______.

A．experience of the changes
B．admiration of the changes
C．analysis of the changes
D．hope for changes
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单项选择题
By using the phrase stay tuned for good news (Line 5, Para. 3) the author wants us to _______.
A．try and be more optimistic
B．wait for the situation to change for the better
C．expect more positive innovations
D．hope that the good news won't change
单项选择题
Digital technologies really began to take form when _______.
A．DVD technology was introduced
B．it was used with photography
C．used in computing
D．information was encoded
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