How did you manage to get to the school on time_________you missed the school bus?

下列词语全是反义词的一项是

Was it through Mary__________ wasworking at a high school_________ you got to know Bob

As a soldier , you ____ do as the head tells you .

填入下面一段文字横线处的语句，最恰当的一句是（ ）人们只知道噪声影响听力，其实噪声还影响视力。试验表明：当噪声强度达到90分贝时。人的视觉细胞敏感性下降，识别弱光反应时间延长；噪声达到95分贝时，有40％的人瞳孔放大，视力模糊；而噪声达到115分贝时，多数人的眼球对光亮度的适应都有不同程度的减弱。 。