A:①②
B:①③
C:②④
D:③④
They __________ to the countryside and __________ many farms there.
原题:如图1,在平行四边形ABCD中,点E是BC的中点,点F是线段AE上一点,BF的延长线交射线CD于点G.若 AFEF =3,求 CDCG 的值.