She is making herself ill with _____ overher son’s future.

As nobody here knows what is wrong with the machine, we must send for an engineer to _________ the problem.

u notice Tom was busy all day in his office—Oh, yes, he has just finished his business tour ofChicago He has a lot of work to ___

What do you think of your new neighbor— There are some things that are not easy to ______ and his coldness is one. He always behaves himself too proudly.

I _____ Chinese dishes for my foreign friends tomorrow evening.