the students are talk about their weekends 改成问句,两种____are talk about their weekends?____are the students talk about?

the students are talk about their weekends 改成问句,两种____are talk about their weekends?____are the students talk about?
the students are talk about their weekends 改成问句,两种
____are talk about their weekends?
____are the students talk about?

the students are talk about their weekends 改成问句,两种____are talk about their weekends?____are the students talk about?
Who
What
注意 talk 要改为talking.