Four-thirds of the students in that school _______ around to study medicine last year.

Four-thirds of the students in that school _______ around to study medicine last year.
Four-thirds of the students in that school _______ around to study medicine last year.

Four-thirds of the students in that school _______ around to study medicine last year.
应该系are be around to do等于 be about to do 暂时找不到依据