1.   Concerned by the mounting protests, the government opened negotiations with opposition parties last week.

2.   Concerned by increasing talk of strict measures to counter climate change, he began investigating carbon offsets three years ago.

3.   Concerned by the odds against them, most parents apply to multiple schools and thereby turn the admissions process into something akin to a full-time job.

4.   Concerned by rising river levels, Army engineers recently constructed a levee to protect themselves as they worked on the bridge and the ramp leading to it.

5.   Concerned by the French findings, the World Health Organization met in June in Geneva to discuss the elusive subtype O.

6.   Dr. Turek is both encouraged and concerned by this result.

7.   Heart specialists and obesity specialists said they were very concerned by the observations.

8.   Japanese officials appeared particularly concerned by comments made Thursday to the Senate Foreign Relations Committee by Secretary of State Warren Christopher.

9.   Money managers said that might have been triggered by investors growing concerned by the drop last week in Treasuries, the benchmark for the bond market.

10.   Monday, at least, they did not seem too concerned by that prospect.