If he takes on this work, he will have no choice but ______ an even greater challenge.
I think they’ve got to the very point _______ a change is needed, or they will fail.
The clever boy made a hole in the wall, ____ he could see ____ was going on inside the house.
He had no sooner arrived there ________ pestering his doctor.
While shopping, people sometimes can't help _______ into buying something they don't really need.
With no one to ______ in such a frightening situation, she felt very helpless.