11.   Scientists are also pondering other ways to eradicate the pool of infected resting cells.

12.   Some theorists are already pondering ways that the inflation model could still be compatible with a low-density universe.

13.   The first speaker, Steinberg, pondered the way each painter painted fingers.

14.   Amid the intense fighting, the United Nations pondered ways to end the killing and avert the threat of mass deaths from cold and starvation this winter.

15.   Elsa Suarez, who is studying hotel and resort management, spent part of her spring semester pondering ways to make food taste better aboard a space hotel.