中国青年志愿者协会的缩写是（）
A.CYVA
B.CNVA
C.CNVB
参考答案：A
—Our country _____ a lot so far.
—Yes. I hope it will be even _____ .[ ]
A. has changed ; well
B. changed ; good
C. has changed ; better
D. changed ; better
机身飞机蒙皮换新、切割、挖补及口盖换新其对缝间隙和阶差的要求是什么？
