While shopping, people sometimes can’t help ________ buying something they don’t really need.
________much advice I gave him, he did exactly what he wanted to do.
The research is so designed that once________nothing can be done to change it.
Visitors________not to touch the exhibits.
It is known to all that________you exercise regularly, you won't keep good health.
—What would you do if it________tomorrow?—We have to carry it on, since we've got everything ready.