A:sleeping
B:to slee
C:to have slept
D:to be sleeping
I like to eat apples, __________ I don't often eat them.
在两个袋内,分别写着装有1,2,3,4,5,6六个数字的6张卡片,今从每个袋中各取一张卡片,则两数之和等于9的概率为 ( )