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。每空格限填一词)
1.More and more people like________by plane. (travel)
2.How many________are there in your school? (woman teacher)
3.In the past, none of the astronauts was woman. All of________were men. (they)
4.There will________be more flyovers in Shanghai. (possible)
5.It is comfortable to stay in an________room. (air-condition)