根据句意，写出括号内所给单词的适当形式。
Frank is ______________ (real) ill today. He has to stay at home and take a rest.
They are in the Huanghe ______________ (swim) Club. They want to be good swimmers like Sun Yang.
Please give my best ______________ (wish) to your friend for me, my dear child.
The students in our school visit the Wuxi Museum _____________ (two) a year.