58.Firms that use computers have found that the number of staff __________ is needed for quality control can be substantially reduced.

　 whose

　 what

　 that

正确答案：D

解析：

解析:语法结构。that is needed for quality control 为定语从句,修饰 staff。as 用作关系代词时先行词需有 such 或 the same 修饰。使用计算机的公司已发现,质量控制人员的数量可以大幅度裁减。

245.Mary is ______ hardworking than her sister, but she failed in the exam.

244.When you have finished with that book, don’t forget to put it back on the shelf, ______ ?

243.When the sentence “Shall I drive you to the airport first?” is turned into indirect speech, which of the following is most appropriate?

242.Fool __________ Michael is, he could not have done such a thing.

241.When the sentence “They had made a mess of the house” is turned into passive voice, which of the following is CORRECT?

240.Which of the following italicized parts modifies an adverb?

239.The research team can handle ____________ needs to be handled.

238.Which of the following reflexive pronouns is used as an object?

237.Which of the following tag questions is INCORRECT?

236.Please pardon _____________ you.