Complete the sentences with the given words in their proper forms (用括号中所给单词的适当形式完成下列句子)
About 50 farmers will take part in the competition with their ________. (wife)
Jack lives on the ___________ floor of this tall building. (nine)
My mother bought ________ a dress on her fortieth birthday. ( she )
You can find the ___________ room there. (change)
_________ doesn’t have to cost much money. (happy)
The film is so interesting. It is full of _____________ (laugh)
The car drove away quickly and soon it _________ . (appear)
We’ll _________ choose the most beautiful flowers from them. (certain)