---Why does Kate look so ?
---Because her father was hit when he went to work .
A. happy, by car
B. unhappy, by car
C. happy, by a car
D. unhappy, by a car
网友回答
A. happy, by car
B. unhappy, by car
C. happy, by a car
(答案→)D. unhappy, by a car
解析：：考查词组。句意：---Kate为什么看起来不开心？---因为当她的父亲去工作的时候，被汽车撞了。故选D。