A. Do you think the hummingbirds will come back! No, this isn't it. It's a question, so it needs to end in a ?.
B. Hummingbirds are kind of interesting! This might be it, considering the fact that this a direct sentence, but the exclamation point isn't needed.
C. When I see a hummingbird, I get so excited? No, this isn't a question.
D. I love hummingbirds! Maybe, since this is more of stating a fact and getting excited about the hummingbird which is nonetheless an animal/object.
Left choices: B and D.
I'd have to say... D, since B is kind of just stating something is interesting rather than loving something, however, both are punctuated correctly. Answer: D
When the speaker comes to the table “tomorrow,” he will no longer be a second class citizen, but finally recognized as the full member of American society that he is.