Normally，foreachcupofgreentea，（）oftealeafisenough.Andforeachpotofoolongteaorpu”ertea，it”sbettertouse（）tealeaf.

Normally，foreachcupofgreentea，（）oftealeafisenough.Andforeachpotofoolongteaorpu”ertea，it”sbettertouse（）tealeaf.
A.4g，7g
B.3g，7g
C.7g，3g
D.8g，4g
正确答案：B