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.
