— I _______ the dishes for over a week.
题型：选择题
问题：
— I _______ the dishes for over a week. It’s your turn.
— I ______ you would say something like that.
A．have washed; have known
B．have been washing; knew
C．have washed; know
D．have been washing; know
，碳原子的最外层电子数为______，写出一种你知道的碳的单质的名称________。