She looks sad. Could you please tell me ____ that prevents her from being as happy as before?

Jill and Anna were tired, but _______ of them stopped to have a rest.

– When does your plane take off?—– At 3:00 p.m. tomorrow, I’ve just called the airport to ____it.

I havereached a point in my life I am supposed to makedecisions of my own

One can not do _______ small talk well for ______ lackof confidence.