–What do you think of the man？--I find _____ difficult to work with him. 

To go on until you succeed is what life is       about.

—Have you got used to the Chinese food, Robert?—Yes, but I don't like ____ when a Chinese host keeps serving me the food I don't like.

________ can be good at something for 40 years if he doesn’t love it.        

 --Excuse me, I want to have my watch fixed, but I can't find a repair shop.--I know___________ nearby. Come on, I'll show you.