题干
--- I’ve told her many times, and she still forgot about it!
--- I understand. It’s true that she_______be very forgetful sometimes.
A：ca
B：would
C：should
D：must
答案(点此获取答案解析）
A
中选出2个数（允许重复）作为实部和虚部，可以组成虚数的个数为（ ）