凡在居民密集区进行强噪声施工作业时，要严格控制施工作业时间，晚间作业不超过( )时，早晨作业不早于 ( )时。
A. 22；6
B. 23；7
C. 83；6
D. 22；7
According to the passage, the author believes that ______.
A. people used to question the value of college education
B. people used to have full confidence in higher education
C. all high school graduates went to college
D. very few high school graduates chose to go to college
风燥伤肺咳嗽的临床主要特征是( )
A. 咳嗽声重，咯痰稀薄色白
B. 咳嗽痰多，咳声重浊，痰白黏腻或稠厚或稀薄
C. 干咳，连声作呛，无痰或有少量黏痰，不易咯出
D. 咳嗽气粗，或喉中有痰声，痰多质黏腻或黄稠，咯吐不爽
E. 以上均不是
I didn't actually see them ______ the safe, but I heard them ______ about that.
A. open, talk
B. to open, talk
C. open, talking
D. to open, talking
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