— It's raining! When did it start?— I don't know exactly. In fact, it _________ all this afternoon.
A:lasts
B:lasted
C:has lasted
D:will last
I like____.
他们准备在九年级主题板报比赛,同学们各抒己见,提出了许多要求和注意事项,
集合A=x|x+1≤2,B=y|y=x-1,-1≤x≤1,则A∩CRB=( )