可以用完成时态,下面这道题就是很好的例子。
52. The rising of costs of data-processing operations at many financial institutions has created a growing opportunity for independent companies to provide these services more efficiently and at lower cost. (A) The rising of costs (B) Rising costs (C) The rising cost (D) Because the rising cost (E) Because of rising costs C is the best choice. In choice A, The rising of costs is unidiomatic (rise 有名词,用rising当然会错), and in B costs... has lacks subject-verb agreement. Choices D and E produce sentence fragments since Because makes the clause subordinate rather than independent. |