Question

translate to smile into spanish by filling in the missing letters: _on_

Explanation:

The Spanish infinitive verb for "to smile" is "sonreír". Looking at the given structure "_on____", we can see that the correct letters to fill in are "s" at the start, "reír" after "on" (but in the given blank structure, the middle part after "on" would be "reír" but the blank here is structured as _on____, so the full word structure with the blanks filled would be "sonreír" where the first blank is "s", then "on", then "reír" (but in the given input's blank, the part after "on" is represented as the remaining blanks). So filling the first blank with "s" and the blanks after "on" with "reír" (but in the given text box structure, the correct filling for the first blank is "s" and then after "on" it's "reír", so the word is "sonreír".

Answer:

s on reír (filling the first blank with "s" and the blanks after "on" with "reír" to form "sonreír")