用所给单词的适当形式填空。
I don’t like traveling by plane. I think it is much _________(safe) to travel by train.
How _________(excite) he is to go shopping with his mum!
Are the twins old enough to dress ___________ (they)?    ---Yes, they are.
_________(near) 250 people lost their lives in Flight MH370.
--Do you know the _________(wife) names? –No, I know none of them.