题目

About a year ago, I had to spend a week in a hospital, because of the deadly food poisoning. There I met an elderly woman, who _______ to be a professional musician. That time when I met her, the idea of learning to sing didn't _______ my mind. I thought it was something _______ and not meant for me, like being an airplane pilot.And only recently, I suddenly decided to learn singing.1 was _______ my dog early in the morning. I sang _______ to myself and it made me feel so wonderful. At that moment I _______ I had known more good songs and how to control my _________ better. And then I thought,20．如图所示是一种从井里汲水装置示意图，在汲水的过程中，人向右运动，水桶向下运动，当水桶的速度为v时，与人相连的绳子与水平方向的夹角为θ，则人的速度大小为v1为（　　）A．vcosθB．$\frac{v}{cosθ}$C．vsinθD．$\frac{v}{sinθ}$