下列各组句子中，加横线词的词类活用现象相同的一组是（ ）

Don’t run in the classroom, you may hurt yourself.

Are all the students from in your class—No, there are only 3 in our class. The others are from other countries.

No dictionary can ______all the English idioms.

5. I don’t know what to_________at the university. I can’t make any forecasts about my future.