題組C　　
        Jack, Ann, and Rita are good friends. They 　36　 in going trick-or-treating since last Halloween. This year they have spent some time preparing scary masks and costumes. They have decided 　37　 they will put them on and go from door to door to ask for candy. They won’t go home without 　38　 their trick-or-treat bags. However, their parents are a little worried about their teeth. They don’t want them to eat too much candy because it’s bad for teeth.
【題組】36.
(A)interested
(B) were interested
(C)have been interested
(D)were interesting