He constantly________his proposal that________of the budget surplus be used to offer a voluntary prescription drug benefit to seniors.

单项选择题Scientists have warned that penguins in the Antarctic could be very________to changes in climate and could be threatened by any long-term temperature shifts.

单项选择题Since settling in Scotland I ________ golf as a hobby.

单项选择题Never________the power of your actions. With one small gesture you can change a person’s life.