当前位置:学历考试成考

问题:

[单选] The development of the light bulb ________partly as a result of the widespread availability of

A . occurring
B . was occurring
C . was occurred
D . occurred

正确答案: (免费查看答案)

  参考解析


考的是语态和时态。讲的是过去的事情,用一般过去时。Development的出现或发生,可用主动态。选项D是正确的。【句子大意】灯泡的发展一部分是由于电力的广泛使用、对便宜和清晰光亮的需求。

在线 客服