23.Paragraph 1 _______.
24.Paragraph 2 _______.
25.Paragraph 4 _______.
26.Paragraph 5 _______.
A.Factors of physical fitness
B.Our body needs exercise
C.The result of lacking exercise
D.Muscles need exercise
E.The function of muscles
F.The way of keeping fit
27.Some people have difficulties in standing up due to _______.
28.Your muscles become weak when they are _______.
29.To keep fit,you have to _______.
30.Muscles can help raise blood pressure by _______.
A.be overweight
B.lacking adequate exercise
C.hurt badly
D.not used
E.do exercise
F.tightening blood vessels
答案:AECB BDEF