50. Sometimes high temperature may __________ in death of the plants.
A. suffer
B. exist
C. render
D. result
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51. From that moment on, they __________ on playing not only Asian but World football.
A. focus
B. shape
C. rank
D. emphasize
52. People believe that massage may relax muscles, relieve __________ and improve the blood circulation.
A. manual
B. vision
C. affair
D. stress
53. Every weekend they go to the gym for a __________ by playing table tennis.
A. workout
B. manual
C. function
D. pump
54. These machines have increased only marginally in value over the past __________.
A. economy
B. zone
C. percent
D. decade