1.   But Andrew acknowledged that no one could be sure that the gains would be sustained.

2.   But one agency executive who competes against Burger King questions the ability of any fast-food marketer to sustain such gains.

3.   But Whittle acknowledged that those gains must be sustained for far longer than two years to be considered persuasive.

4.   Market watchers have generally agreed that stocks would not show sustained gains until corporate profits begin to improve.

5.   More work needs to be done to see if the gains are sustained.

6.   Short covering by investors betting against the market also helped sustain the gains.

7.   The market has sustained the gains it made since the terrorist attacks sent stocks to a bear market low seven months ago this weekend.

8.   Trading in Micron options suggests investors are growing more confident it can sustain recent gains.

9.   Although the market extended a rally that began Friday, analysts warned there are no guarantees that the gains would be sustained in the long term.

10.   But analysts warned there are no guarantees the gains could be sustained in the long term.