The main advantage that an online dictionary has over a computer spell-checker for proofreading purposes is that the dictionary
a. contains the etymology of words so that you can review word origins.
b. provides synonyms so that you can make your writing more interesting.
c. gives you the definitions of words so that you can check word meanings.
d. offers pronunciations so that you can hear how to say a word.

i would say that these are the two thesis statements best for a literary analysis essay on recurring themes in shakespeare's romeo and juliet:

1.  in romeo and juliet, shakespeare demonstrates that love comes in a variety of forms, be it romantic, familial, or between friends.

2.  shakespeare explores the struggle for identity through the character of juliet in his play romeo and juliet.

the other theses aren't reoccurring in this play. 

explanation:

isn't this axel talking to his uncle?

you can't answer this. more information is needed.

this is the sentence that best shows that fast food restaurants are designed for using unskilled labor.