— should we clean the library?
—Twice a week.
A:How many
B:How much
C:How long
D:How often
张爷爷家养了6只鸡,9只鸭子,8只鹅,鸡的只数是鹅的( )。
精卫____ ____
____ ____卓绝
全____全____
风雨____ ____
____ ____相照
冲____陷____