In the sentence "The runners raced around the track", which word is a preposition？

rglss,n instrument used ______, usully consists of two bulbs united by nrrow neck.mesures time B．time is mesured C．for mesuring time D．the time for mesuringA．measures timeB．time is measuredC．for measuring timeD．the time for measuring

A.among
B.between
C.in
D.into

A.无保留意见
B.保留意见
C.否定意见
D.无法表示意见