SENTENCE[C]›a sentence or phrase that asks you for information: Is it OK if I ask you a few questions?He refused to answer my question.If you have any questions about the scheme, do ask me."So where's the money coming from?" "That's a good question" (= I do not know).
SITUATION[C]›a situation or problem that needs to be considered: This documentary raises important questions about the American legal system.Two important questions arise from this debate.
DOUBT[U]›doubt: [+ that]There is no question that this was an accidental fire.His ability as a chef has never been in question."So you agree she's the right person for the job." "Yes, absolutely, without question."The report brings/calls into question (= causes doubts about) the safety of this drug.
sb/sth in question›the person or thing that is being discussed: He claims that he was in the pub with his girlfriend on the night in question.