问题
Have you decided ____________ on April 1st—I will put a piece of paper which says “Hi” on my brother’s back.
A:what joke will you play on your brother
B:who you will fool
C:what will you put on your brother’s back
D:how you will fool others;
B:who you will fool
C:what will you put on your brother’s back
D:how you will fool others;
正确答案是：
