来自刘怡文的问题
iswassunnyyesterday,butit'ssnowyandmuch()todayiswassunnyyesterday,butit'ssnowyandmuch()todayAcolderBcoldestCmorecolderDcold加理由，好的话加悬赏
iswassunnyyesterday,butit'ssnowyandmuch()today
iswassunnyyesterday,butit'ssnowyandmuch()today
Acolder
Bcoldest
Cmorecolder
Dcold
加理由，好的话加悬赏
