Final answer:
The sentence should be completed with 'Do you sleep' using the simple present tense, which is suitable for describing regular actions such as sleeping habits.
Step-by-step explanation:
To complete the sentence with the correct form of the verbs given, we need to choose between the simple present and the present continuous tenses.
The sentence "________ (you / sleep) late on weekends?" can be completed as follows:
"Do you sleep late on weekends?"
This uses the simple present tense, which is appropriate for regular actions or habits, like sleeping late on weekends.