英语选修7人教版新课标unit 2笔试部分测试（1）及答案 robots（新人教版选修7 unit 2） 第二部分 同步语法 （满分25分）第一节 单项填空。（5分） 1. when you ______ with your work on the internet, you should logout(退出) your computer from the firewall. a. are finished b. were finished c. have finished d. had finished 2. whatever is done has ______ by human beings.
