ask [æsk] 问；要求；请；请求；询问
problem [ˈprɒbləm] n.难题；困难；棘手的问题
Can I ask a question?
He asked her to marry him.
He was so busy that he had to ask for help.
Let me know if you have any problems.
This is going to be a huge problem for us.
‘Thanks for the ride.’ ‘No problem.’
‘Can I pay by Alipay?’ ‘Yes, no problem.’