Answer:
He starts his phrases with "Let us..." three times (on lines 53, 56, 59).
He repeats "Let us strand up and talk against it" two times (on lines 57 and 58).
Explanation:
To complete this exercise, you have to read the speech Bill Clinton gave in the Oklahoma Bombing Memorial Address and then select the phrases he repeats.
Repetition is usually used in speeches because it's the best way to emphasize what you're trying to say. It's more probable that people would remember what you said.