Which of the following is a signal word for problem/solution?
a. therefore
b. thus
c. next
d. since

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

In writing, an idea map is a writing plan similar to: a)an outline. b)an illustration. c)a conclusion. d)a graphic.

Sure, i wish things had turned out differently for me in vietnam. but i know things could have turned out worse, too. so ljust try to be for what i do have and do my best to be independent. i can dress myself and even tie a tie. no more playing guitar, though. if i close my eyes, i can just about hear the music. just strumming my heartstrings is what i'm doing, i suppose. how could the author best resolve this situation to create a feeling of somber regret? a. the narrator describes the difficulty in cooking for himself. b. the narrator decides to sell his guitar and take up a new instrument. c. the narrator points out that he doesn't have to wear a tie too often. d.the narrator mentions a friend who did not live through the war.