He spends all his spare time planting trees, and by the end of this year he______2 000.
A. had planted
B. will have planted
C. will plant
D. has planted
______we get support from the trade unions, we should win the election.
A. If
B. Unless
C. As long as
D. Supposing
如果要彻底退出交换机的配置模式,输入的命令是——。
A. CtrI+C
B. end
C. no config-mode
D. exit
构建FTP服务器的软件很多,很多互联网FrP服务器采用——。
A. IIS 6.0
B. FTP Server
C. Serv—U
D. Serv—U FrP Server