【单选题】This question is so hard that very ______ students can answer it.
【单选题】This question is so difficult that only ______ students can answer it.
【单选题】This question is so easy that _____ can answer it.
【单选题】This question is so easy that _____ student can answer it.
【单选题】This question is so difficult that __ people are able even to understand ie.
【单选题】This question is so difficult that ______ students can answer it.
【简答题】This question is so easy that____can answer it.