根据所给提示，完成句子。每空一词，含缩略词。
（1）He did his homework last night. (改为否定句)
He ____ ____ his homework last night.
（2）The kid is playing the piano at the school music club. (对划线部分提问)
____ is the kid ____ the piano?
（3）Visitors love this city because it has historical sights and delicious food. (改为同义句)
Visitors love this city ____ ____ its historical sights and delicious food.
（4）他两个月没有收到他儿子的信了。(完成译句)
He hasn’t ____ ____ his son for two months.
