A:2×6
B:3×4
C:6+6
D:4×4
-- Such beautiful flowers! I can't decide _______ for my mum.
-- For Mother's Day, it can't be better to take some carnations (康乃馨).
face
小胖买了3本同样价格的练习本,共花了a元,每本练习本的价格是____元