Hey, voici ma réponse :
Exercise 1:
The document 1 is the definition of the world "smash" in the English dictionary. I can see the phonetic symbols and a few abbreviation: "VB", "intr", "etc".
The document 2 is the same definition in the online English-French dictionary (Collins). I can see the phonetic symbols and a few abbreviation: "noun" "f", "m".
Exercise 2:
The worlds are old and italics because there are prepositions.
Exercise 3:
The documents are differents because in Collins dictionary, there are the translation of the sentences in English and French.
In the WorldReference dictionary, there are the meanings which are numbered.
In the Collins dictionary there are the genre of the world "male" or "female".
Exercise 4 :
a. The verb to "smash " is "to smash", the adjective is "smash up" and the noun is "smash ".
b. break or beat
c. to break or to beat, to plate
d. 1 sentence : 1
2 : 2
3: 1
4: 2
Si tu as des questions n'hésite pas à me demander ^^