1.   Car prices can vary a lot.

2.   Furniture tends to vary a lot from week to week.

3.   In loud explosion scenes in action movies, on the other hand, the picture varies a lot, but the quality of the sound is less vital.

4.   My earnings vary a lot.

5.   Russia is beginning to produce its own MBAs, although standards vary a lot.

6.   Thoresen explains that the severity of oxygen starvation varies a lot.

7.   The vaccine focuses on protein targets on flu viruses, and these targets vary a lot from one strain to the next.