Have you ever come to Quanzhou before— No. This is the first time that I _________ this city.

Lilyis popular among her classmates shecan be annoying at times

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。 。

been living in the United States fortwenty years, but seldom _____ so lonely as now．

____ Betty this morning?— Not yet, but she is sure to be here before noon