His brother likes (giraffes).怎样对括号内的提问?

问题描述:

His brother likes (giraffes).怎样对括号内的提问?
还有:What are you doing?_I'm helping my mom ( ).用cook的什么形式?
Mary is the last one ( )the classroom.
A.leave B.leaves C.leaving D.to leave

What does his brother like
原形 cook
D