His parents are very concerned about his son at school because he moving in his seat.
A. is always keeping
B. always keeps
C. does keep
D. has always kept
网友回答
(答案→)A. is always keeping
B. always keeps
C. does keep
D. has always kept
解析：考查时态;进行时和always连用，表示埋怨或赞扬的语气，句意是：父母很担心在学校的儿子，因为他总是在座位上动来动去。显然这里带有不满的语气。选A。