- 必修一__isknowntousall,goodfriends_
- __is known to us all,good friends__happiness and value to life.
A.It;add
B.As;add
.It;add to
D.As;add to
- __is known to us all,good friends__happiness and value to life.
A.It;add
B.As;add
C.It;add to
D.As;add to
你仔细看句子，后面已经有to了，value （to） life.
如果你再选add to，不是重复了？