Failed to start LSB: Bring up/down networking.

hi to all, I've centos7.5 in VM Client. after last reboot in my desktop there is no network. I removed and added a

new network adapter, and googled so much but no success. I also did it :
Code:[root@centos7client rahul]# systemctl restart network
Job for network.service failed because the control process exited with error code. See "systemctl status

network.service" and "journalctl -xe" for details.
[root@centos7client rahul]# systemctl status network -l
Dec 29 17:44:09 centos7client.db.net network[3849]: RTNETLINK answers: File exists
Dec 29 17:44:09 centos7client.db.net network[3849]: RTNETLINK answers: File exists
Dec 29 17:44:09 centos7client.db.net network[3849]: RTNETLINK answers: File exists
Dec 29 17:44:09 centos7client.db.net network[3849]: RTNETLINK answers: File exists
Dec 29 17:44:09 centos7client.db.net network[3849]: RTNETLINK answers: File exists
Dec 29 17:44:09 centos7client.db.net network[3849]: RTNETLINK answers: File exists
Dec 29 17:44:09 centos7client.db.net systemd[1]: network.service: control process exited, code=exited status=1
Dec 29 17:44:09 centos7client.db.net systemd[1]: Failed to start LSB: Bring up/down networking.
Dec 29 17:44:09 centos7client.db.net systemd[1]: Unit network.service entered failed state.
Dec 29 17:44:09 centos7client.db.net systemd[1]: network.service failed.How to get rid of this.