单项选择题
A. compensate for a problem brought by arm exercises B. make the whole body balanced C. prevent fatigue D. lose weight
A. Trimming fresh fruit. B. Wrapping fresh vegetables. C. Stocking shelves. D. Sweeping the floors.
A. It should be raised by soldiers. B. It should be raised quickly by hand. C. It should be raised only by Americans. D. It should be raised by mechanical means.