Based on the clue 'a struggle to write the the butterfly', what is the answer?

Based on the clue 'a structure for venting gas or smoke', what is the answer? Based on the clue 'a structure of crossed wooden strips not something...', what is the answer? Based on the clue 'a structure that crosses a river', what is the answer? Based on the clue 'a structure where soldiers are quartered it follow...', what is the answer? Based on the clue 'a student the opposite of high', what is the answer? Based on the clue 'a student at great neck north high school shes the...', what is the answer? Based on the clue 'a student at sandhurst he later served in british ...', what is the answer? Based on the clue 'a student has to take the preliminary scholastic a...', what is the answer?