Students are always interested in findingout ________ they can to with a new teacher

So difficult ______ it to work out the problem that I decided to ask Tom for advice.

Does your uncle still smoke?—He ____________given it up. It’s two years ever since he ____________.

Living or studying abroad, you are supposed to 　　　　yourself to new manners and customs.

President Hu Jintao urged every effort _____ to rescue and treat the injured when the earthquake happened in Sichuan in 2008．