根据句意和汉语注释，在答题卡标有题号的横线上，写出单词的正确形式
There are __________ (各种各样的) ways to solve the problem.
Traveling to Shanghai is an ______________ (令人愉快的) experience.
I asked my sister if she wanted to go with me and she ____________ (点头).
After being ironed, the silk blouse feels even ___________ (光滑的).