Answer:
The sentence that we must complete is:
"Quien _________ dos lenguas vale por dos."
A rough translation of this is:
"Who ____ two languajes, is worth for two"
The word that can complete the sentence is "speak" or "habla" in Spanish, the complete sentence is:
Quien habla dos lenguas vale por dos.
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!
Sameeeeeeeeeeee♀️♀️♀️♀️♀️