-----------!let's go out for a walkA isn't it a lovely dayB what a good dayC how well the weatherD what a day

-----------!let's go out for a walkA isn't it a lovely dayB what a good dayC how well the weatherD what a day
-----------!let's go out for a walk
A isn't it a lovely day
B what a good day
C how well the weather
D what a day

-----------!let's go out for a walkA isn't it a lovely dayB what a good dayC how well the weatherD what a day
B和D应是 what a nice day C应是 how good/nice the weather is

A

A isn't it a lovely day
C、D不完整，B 形容天好，一般不用good，而用nice。

C、D不完整，B 形容天好，一般不用good，而用nice或fine