Answer:
Question 39) B
Question 40) D
Question 41) B
Question 42) C
Explanation:
Question 39) Altough edible means safe to eat, the context makes the reader infer that the food was not good tasting. Then the phrase continues with "—or maybe it looked just barely safe to eat." so that way it's possible to understand how the food wasn't good tasting and also not safe for Joshua.
Question 40) As Joshua and Dong Soo became really close friends, it's possible to infer that it's possible to learn new things, in this case one from another, being from different countries.
Question 41) Joshua and Dong Soo both accepted and appreciated their cultural differences and also wanted to learn from these.
Question 42) In this case, the setting of an American neighborhood gives Joshua confidence and ease, because he is in his country and everything's familiar to him, while instilling reluctance and shyness in Dong Soo, because he is foreigner.