Lucas ............ tv for hours! He must go to bed now.
-
have been watching
-
is been watching
-
has been watching
-
had been watching
C
Correct answer
Explanation
"Lucas" is a singular subject, requiring "has" rather than "have". The present perfect continuous tense ("has been watching") is used here to describe an action that started in the past and is still continuing or has just finished, with a strong connection to the present.