英和和英

a problem

remedy a problem

an elusive problem

pose a problem

to ask too many questions

an intractable problem

another separate problem

a formidable problem

the problems involved

miscellaneous problems

the guts of a problem

an involved problem

an issue that becomes a problem

a slight problem

a question arose

an off issue

an off issue

of a problem, to be solved

What's the matter?

a difficult problem

a difficult problem

a difficult problem

to go to work on a problem―proceed to a question

Keep to the point!

a trifling matter

a sticky question

a touchy subject

a nasty problem

A question is up.

an intricate problem