_________ useful invention the computer is.–Yes, It helps us a lot.

What should I do, doctor ________ healthy , you should take more exercise.

Jackson is cheerful about his life ________ he is suffering from cancer.

Lucy will have learned English for 8 years by the time she ____ form the university next year

____Switzerland (瑞士) is very small , _____it is the land of watch and it is very rich.