如果按景物明亮部位曝光，景物暗部层次效果是（）
A.层次极丰富
B.层次丰富
C.层次一般
D.层次损失
参考答案：D
_____ the end of last month we had learned 5 English songs. [ ]
A. By
B. In
C. On
D. will visit
