22: limpiar los lagos y recoger la basura
1. Conocen
2. Sabemos ( I think the sentence is a bit wrong itself bc it should be Ellos (they) instead of nosotros (we) but thats maybe a book or question error)
3.sirven
4.pides
Buena suerte! Good Luck!
Estan Caminando isn't the answer as because "estan" implies to be another person, but this isn't the case as it's only the man, the man isn't walking (caminando either)
He isn't shopping (comprando) and he isn't painting (pintando)
The only logical answer is he's cooking (cocinando) which is also heavily implied as him having the bowl and whisk
B.) Esta Cocinando is your answer
The answer is d
Siento,Vienen