560-560×27，
=560-160，
=400（册），
答：这时还剩400册未卖出．
The old church, surrounded by tall trees, has_______ many wedding ceremonies.[ ]
A. sighted
B. looked
C. witnessed
D. found
妊娠20周后胎儿在宫内死亡（）
A.流产
B.早期流产
C.晚期流产
D.早产
E.死胎
