A． They look younger than they ar
B． They look much happier than befor
C． Their joints tend to be more flexibl
D． They have fewer diseases than befor
A． marvelous
B． incredible
C． impractical
D． mysterious
A． To show how to use an eye chart in an unordinary wa
B． To show that the regular eye chart is not properly designe
C． To offer supporting evidence to the preceding paragraph
D． To provide a contrast to the preceding paragraph
A． We tend to accept that becoming old is inevitabl
B． We usually have no doubts about doctor's diagnosi
C． Illness often leaves us in a difficult situatio
D． Fixed ideas about illnesses can women the situatio