1．Don't worry．Your voice sounds absolutely(绝对地) fine．
2．As far as I'm concerned，she has the potential(潜力) to become a champion．
3．He was unexpectedly to be appointed(任命) as Sales Manager．
4．It was difficult to evaluate(评估) the damage to Japan because of the tsunami．
5．The actual(实际的) cost was much higher than what we had expected．
6．An active volcano may erupt at any time．
7．Social life is the fountain of wisdom of writers．
