单选题从供选择的答案中选出应填入下列英文语句中______内的正确答案。
Although parallel server hardware has been available for some time, commercially available parallel versions of database (1) are just now arriving from (2) database makers to take advantage ofthe hardware's speed.
Parallel hardware and database (3) are probably overkill for some applications, such as small departmental systems, analysts say. But users at large sites now installing parallel systems say they can (4) improve database response (5) for large decision-support, order-entry, and data warehouse applications.

【正确答案】 C

【答案解析】这是一道时态考查题，本句应为一般过去时，故选C。give rise to的意思是“引起，使发生”。
[参考译文]结构化程序设计实践导致了Pascal语言的产生，在Pascal中引入的构造，提高了程序可读性，提供了更好的程序结构。C则是将汇编语言和高级语言结合起来产生的一种通用语言，可用于从系统程序到应用程序的设计。接着出现了面向对象的技术，与其说它是一个语言，不如说是一种方法学和设计哲学。将所谓的OO扩展附加到像C这样的主流语言，就证明了这一点。