完成句子。
（1）你看起来很不高兴。发生什么事了？
You look very unhappy. What ____ ____ you?
（2）快一点，飞机半个小时后就起飞了。
Hurry up! The plane will ____ ____ in half an hour.
（3）她很高兴照顾那个小孩，因为她非常喜欢孩子。
She ____ ____ ____ ____ look after the kid, because she likes kids very much.
（4）在昨天的聚会上，Alice为客人们跳了舞。
Alice ____ ____ the guests at the party yesterday.
