12.Of course,the conditions of work are very different:The Ponlytechnic is offering two-year contract which could be renewed,but the language school is only offering a years contract,and thats a different minus.

　　六级词汇讲解:

　　该句较长，出现在长对话之中。of course放在句首或句末时起强调作用。offer意为提供，通常指主动提供。which引导的是two-year contract的定语从句，其中renew意为使继续有效;延长期限。minus此处意为缺点，是该句的听音难点所在。

　　英语六级考点归纳

　　minus作名词时，有以下含义:

　　负号，减号。如:

　　Dont forget the minus when you add them up，

　　求和时别忘了负号。

　　不利条件，不足，缺点。如:

　　We should consider the pluses and minuses of the system.

　　我们应该考虑一下该系统的优点和缺点。