1．上图所示为1984年、1985年、1986年、1987年、1988年和1989年商店的增减情况。 2．说明发生这些变化的原因及发展趋势。 New Stores

A．we think about them repeatedly
B．we are determined to remember them
C．they are experimented many times
D．they happen unexpectedly

A．We are more likely to remember things we do than things we see.
B．People always remember pleasant things rather than unpleasant ones.
C．Our ability to remember something depends on our feelings when it happens.
D．We tend to have better long-term memories than short-term memories.