We / should / morning exercise / keep fit. A. We should do morning exercise keep fit B. We should do morning exercise to keep fit C. We should did morning exercise to keep fit D. We should d23/34We / should / morning exercise / keep fit. We should do morning exercise keep fit We should do morning exercise to keep fit We should did morning exercise to keep fit We should done morning exercise keep fitGiải thíchĐáp án đúng là B