《汽车总动员》是哪国动画片（）
A.中国
B.美国
C.日本
D.加拿大
参考答案：B
计算25×48+103×25-25×51=______．
It suddenly occurred to him ________ he had left his keys in the office.(2012·江西)
A．whether
B．where
C．which
D．that
