New technologies have made ____ possible to turn out new products faster and at a lower cost.

As the busiest woman in Norton,she made_________her duty to look after all the other people’s affairs in that town. 

What ____books do you want to read?

—Which of the two T-shirts will you take?—I’ll take       . One is for my brother and the other is for myself.

The boy promised ___ mother never to lie to ___ again.