The missing word in the sentence would be
Nos
The translation is: sit at a table. There is no need to make a reservation. Put your elbows on the table. Put a napkin on top of your legs.
So the answer would be: Sentare en la mesa. Poner la servilleta sobre las piernas.
This is what you would normally do at a restaurant, hope this helps!
Right the Spanish words in the blank
Voy, vas, va, vamos, vain, van (present tense)
A: I go to the beach
B: I go visit the museum.
