1.   Abortion is a controversial issue.

2.   Abortion is a highly controversial issue.

3.   However, accountability has been a less controversial political issue on Merseyside.

4.   If the encyclopaedia has a weakness it is that it sits on the fence on controversial issues.

5.   Several of the professors were internationally known figures who lectured to large audiences and engaged in public debates over controversial issues.

6.   To be successful, a former member must have served on an influential committee and acquired expertise on controversial issues.

7.   We try to steer clear of controversial issues in the workshops.