请在第(50)处选择正确答案______

单选题请在第(50)处选择正确答案_______

A．hazard
B．factor
C．effect
D．occasion

参考答案A

解析:A。本题考查名词词义的辨析。hazard意为“危险”，factor意为“因素”，effect意为“效果”，occasion意为 “场合”。原句意为“肌肉的疲劳是一个非常严重的安全隐患”，故选A。

单选题The world's greatest sporting event, the Olympic Games,-upholds the amateur ideal that __________matters is not winning but participating．

A．anything
B．it
C．what
D．everything

单选题 All __________is a continuous supply of the basic necessities of life．

A．what is needed
B．for our needs
C．the thing need
D．that is needed

单选题 There ought to be less anxiety over the perceived risk of getting cancer than __________ in the public mind today．

A．exists
B．exist
C．existing
D．existed