1.   And because it was designated a historic landmark, Graves and Klipp Colussy worked to maintain as much of the building as possible.

2.   And so he works to maintain an equilibrium that allows him to put almost everything into his research, while holding back enough to survive disappointment.

3.   A currency board works to maintain a fixed exchange rate.

4.   But as long as America works to maintain its technological lead, there is no reason why any challenge to American dominance should succeed.

5.   But he must also work to maintain the very Yugoslav Federation over which he presides.

6.   But he must also work to maintain the Yugoslav Federation over which he presides.

7.   But the Liggett papers indicate that researchers were working to maintain high nicotine levels while reducing the harshness of the smoke, for example.

8.   Freeh has assiduously worked to maintain good relations with members of Congress, who are predisposed to give favorable treatment to any director of the bureau.

9.   In working to maintain our relationship, we were both pushed to move beyond what was comfortable, or easy, or natural.

10.   Perspiring police officers worked to maintain four long, snaking lines of mourners.