A. concerned. B. raised C. developed D. returned
Giải thích
Chọn đáp án C.
concemed/kan'sɜ:nd/ (v-past/ adj): quan tâm, liên quan
E.g: Her attitude concerned me.
raised /reizd/ (v-past): nuôi, tăng
E.g: The government raised taxes.
developed /di'vel.əpt/ (v-past): phát triển
They developed a new policy to deal with the problem.
returned /ri’tɜ:nd/ (v-past): trở lại, trở về
E.g: They returned home after many years of travelling.