Which of the following sentences uses a colon correctly?
a. i like to go camping: but my friend likes to go shopping.
b. for my camping trip i packed a stove: a lantern: an ax: matches: and an emergency kit.
c. we visited four states last year: colorado, arizona, california, and nevada.
d. we visited: colorado, arizona, california, and nevada.

Which line from the story of my life by helen keller is an example of a simile? during the whole trip i did not have one fit of temper, there were so many things to keep my mind and fingers busy. i was like that ship before my education began, only i was without compass or sounding-line, and had no way of knowing how near the harbour was. one day, while i was playing with my new doll, miss sullivan put my big rag doll into my lap also, spelled "d-o-l-l" and tried to make me understand that "d-o-l-l" applied to both. child as i was, i at once felt the tenderness and sympathy which endeared dr. bell to so many hearts, as his wonderful achievements enlist their admiration.