用 electric, electricity, electrical及 electronic填空

1.Turn off the computer when you don't use it. Don't waste  __   .

2. His father is an          engineer.

3. Do you know who invented the          light?

4. Nowadays most young people prefer to send          mails rather than write letters.

咨询工程师在工程项目招标投标阶段的工作有（）。

A．接收资格预审申请书

B．组织开标

C．发放投标邀请书

D．编制评标办法和标准

E．召开答疑会