.Must I finish ______the book today–No, you______.

I think teenagers should ________ to make their own decisions.

How much did you spend on the new mobile phone—I _____ it would cost me 500 dollars, but I was so lucky to get it at a 15 percent discount.

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。 。

一Have you seenthe film Lost on Journey一Yeah．amazing! It’sthanthe films I have ever seen．