请在第(49)处选择正确答案______

单选题请在第(49)处选择正确答案_______

A．However
B．Lastly
C．Beside
D．Furthermore

参考答案D

解析:D。本题考查逻辑衔接。前文说了重复使用同一工具会对身体构成危害，这里提到第二种危害，故选用furthermore，表递进。C项beside为介词，而besides为副词。

单选题请在第(50)处选择正确答案_______

A．hazard
B．factor
C．effect
D．occasion

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