Question

Police have asked witnesses of the accident to ___________, as the victim is critically wounded, unable to give an account of the accident.

1. A.
   come by
2. B.
   come across
3. C.
   come forward
4. D.
   come on

Answer 1

C
试题分析：A. come by得到，过来         B. come across偶然遇见      C. come forward 自告奋勇 D. come on加油；句意：警察要求事故的目击者自动的站出来，因为被害人严重地受伤了，他不能给事故作出一个说明。故选C
考点：动词短语辨析
点评：词义辨析考的是学生的基础词汇知识，了解每个选项的含义是做好此类题型的关键，解答此类习题，首先要求学生有一定的词汇量，句意理解后便可作答，所以平时的基础知识记忆，词汇积累是解答好这种题的关键，同时要注意这些动词加副词的短语，如果后面接代词作宾语时要放在动词和副词之间。