2008年12月大学英语四级真题试卷及参考答案

are different now from when today's parents were growing up," he says. "Adults are scared of saying, ' Don't swear ', or asking a child to stand up on a bus. They're worried that there will be conflict if they point these things out-either from old...

their hourly output rose when lighting was increased, but also when it was dimmed. It did not __6___what was done in the experiment; ___7_something was changed ,productivity rose. A(n)___8___that they were being experimented upon seemed to be ___9_...

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