Education is too important to take (1) , when people take anything for seriously, they put (2) blinders which cause them to miss the important aspects of (3) is going on around them. They (4) "tunnel vision," which limits and distorts their perception of (5) Education is too important to be limited by those who have chosen to wear blinders and develop tunnel vision.I believe the (6) movement has encouraged many educators to take education too seriously. (7) we take education too seriously, we put standardized (8) scores above children, we put lesson plans above teachers, and we put on our blinders, only to see a rather small segment of the child--that segment that can be (9) easily (10) than looking at the child as a whole. By looking at the whole student, we can get a (11) of whether that student enjoys learning, (12) functioning well with others, and feels good (13) himself. How can we (14) off our blinders How can we eliminate tunnel vision to see the whole child How can we (15) take everything so seriously My recommendation is (16) laugh, teach, laugh!Psychologists have (17) believed that negative emotions cause negative chemical changes in the body. We know the (18) is also true. We know that a person with a good sense of humor has better healing (19) . Laughter actually relaxes the muscles, allows the heartbeat and lowers the blood pressure. Laughter stirs the inside and gets tile endocrine system moving, which can be quite (20) in alleviating disease. Laughter also relieves boredom, tension, guilt, depression, headaches, and backaches. 1（）

A. instructive
B. efficient
C. beneficial
D. profitable