Why are you so happy today? Because I have been chosen to be the chairperson.此段对话的回答部分中的have been chosen为什么不能换成was chosen?

Why are you so happy these Why are you so happy?该怎么回答 If you are so happy where you are,why are you looking for another job? why are you so why are you so why are you so why are you so He asked why you are so happy?为什么这里的的ARE 时态不变呢 Mr.bush is the (lead)of the USA.you look happy ,can you tell me why you are so (happy)? You look happy,can you tell me why you are so（ ）.括号里写happy的哪一种形式? you are so very happy you are happy,so I am happy, You looked _______.Can you tell me why you are so ______?A.happily;happy B.happily;happily C.happy;happy D.happy;happily Why are you so happy today?because I ____(win) the badminton match.填什么 填空 why are you so ( )A scare B happy C lauch Why are you so happy today?Because I ________(win)the badminton match.词性转换 ( )are you so happy now?A.what B.which C.how D.why why are you so diao